From 00344a9ed6b39e1c96f44ed4440f3c440dff44e8 Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Wed, 20 May 2026 18:59:06 +0530
Subject: [PATCH 01/11] chore: Increase start_timeout and link it to
 Preferences -> IdleTimeout for Fluent.

---
 src/ansys/fluent/core/launcher/launcher.py    |  2 +-
 .../core/launcher/standalone_launcher.py      | 28 +++++++++++++++++--
 src/ansys/fluent/core/module_config.py        |  4 +--
 3 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/src/ansys/fluent/core/launcher/launcher.py b/src/ansys/fluent/core/launcher/launcher.py
index 0f8c149a404..207ac04f4d4 100644
--- a/src/ansys/fluent/core/launcher/launcher.py
+++ b/src/ansys/fluent/core/launcher/launcher.py
@@ -237,7 +237,7 @@ def launch_fluent(
         journal(s). The default is ``None``.
     start_timeout : int, optional
         Maximum allowable time in seconds for connecting to the Fluent
-        server. The default is ``60`` if Fluent is launched outside a Slurm environment,
+        server. The default is ``180`` if Fluent is launched outside a Slurm environment,
         no timeout if Fluent is launched within a Slurm environment.
     additional_arguments : str, optional
         Additional arguments to send to Fluent as a string in the same
diff --git a/src/ansys/fluent/core/launcher/standalone_launcher.py b/src/ansys/fluent/core/launcher/standalone_launcher.py
index 11c6bbe1ac0..dbac5317207 100644
--- a/src/ansys/fluent/core/launcher/standalone_launcher.py
+++ b/src/ansys/fluent/core/launcher/standalone_launcher.py
@@ -37,6 +37,7 @@
 
 import inspect
 import logging
+import math
 import os
 from pathlib import Path
 import subprocess
@@ -89,7 +90,7 @@ def __init__(
         precision: Precision | str | None = None,
         processor_count: int | None = None,
         journal_file_names: None | str | list[str] = None,
-        start_timeout: int = 60,
+        start_timeout: int = 180,
         additional_arguments: str = "",
         env: Dict[str, Any] | None = None,
         cleanup_on_exit: bool = True,
@@ -137,7 +138,7 @@ def __init__(
         journal_file_names : str or list of str, optional
             Path(s) to a Fluent journal file(s) that Fluent will execute. Defaults to ``None``.
         start_timeout : int, optional
-            Maximum time in seconds allowed for connecting to the Fluent server. Defaults to 60 seconds.
+            Maximum time in seconds allowed for connecting to the Fluent server. Defaults to 180 seconds.
         additional_arguments : str, optional
             Additional command-line arguments for Fluent, formatted as they would be on the command line.
         env : dict[str, str], optional
@@ -198,7 +199,16 @@ def __init__(
             ui_mode = UIMode.GUI
         self.argvals["ui_mode"] = UIMode(ui_mode)
         if self.argvals["start_timeout"] is None:
-            self.argvals["start_timeout"] = 60
+            self.argvals["start_timeout"] = 180
+        # FLUENT_MAX_IDLE_TIMEOUT is in minutes; start_timeout is in seconds.
+        _idle_timeout_minutes = math.ceil(self.argvals["start_timeout"] / 60)
+        # Fluent to self-terminate after start_timeout seconds of idleness so
+        # that a failed-connection launch does not leave a stale process behind.
+        _setenv_arg = f"-setenv=FLUENT_MAX_IDLE_TIMEOUT={_idle_timeout_minutes}"
+        if self.argvals["additional_arguments"]:
+            self.argvals["additional_arguments"] += f" {_setenv_arg}"
+        else:
+            self.argvals["additional_arguments"] = _setenv_arg
         if self.argvals["lightweight_mode"] is None:
             self.argvals["lightweight_mode"] = False
         fluent_version = _get_standalone_launch_fluent_version(self.argvals)
@@ -294,6 +304,18 @@ def __call__(self):
                 if len(values) == 3:
                     ip, port, password = values
                     watchdog.launch(os.getpid(), port, password, ip)
+            # PyFluent is now connected: disable the idle-timeout guard.
+            try:
+                from ansys.fluent.core.services.datamodel_se import (
+                    convert_path_to_se_path,
+                )
+
+                pref = session.preferences.General.IdleTimeout
+                pref.service.set_state(
+                    pref.rules, convert_path_to_se_path(pref.path), 0
+                )
+            except Exception as ex:
+                logger.debug(f"Could not reset IdleTimeout preference: {ex}")
             if self.argvals["case_file_name"]:
                 if FluentMode.is_meshing(self.argvals["mode"]):
                     session.tui.file.read_case(self.argvals["case_file_name"])
diff --git a/src/ansys/fluent/core/module_config.py b/src/ansys/fluent/core/module_config.py
index ec321a7f6d1..51241885f4f 100644
--- a/src/ansys/fluent/core/module_config.py
+++ b/src/ansys/fluent/core/module_config.py
@@ -259,9 +259,9 @@ class Config:
         lambda instance: instance._env.get("PYFLUENT_USE_PODMAN_COMPOSE") == "1"
     )
 
-    #: The timeout in seconds to wait for Fluent to launch, defaults to the value of ``PYFLUENT_FLUENT_LAUNCH_TIMEOUT`` environment variable or 60 seconds.
+    #: The timeout in seconds to wait for Fluent to launch, defaults to the value of ``PYFLUENT_FLUENT_LAUNCH_TIMEOUT`` environment variable or 180 seconds.
     launch_fluent_timeout = _ConfigDescriptor["Config"](
-        lambda instance: int(instance._env.get("PYFLUENT_FLUENT_LAUNCH_TIMEOUT", 60))
+        lambda instance: int(instance._env.get("PYFLUENT_FLUENT_LAUNCH_TIMEOUT", 180))
     )
 
     #: Whether to show the Fluent GUI when launching the server, defaults to the value of ``PYFLUENT_SHOW_SERVER_GUI`` environment variable.

From 2674a8dbd08bb5c805adcc08fff1a344e2d8f26d Mon Sep 17 00:00:00 2001
From: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>
Date: Wed, 20 May 2026 14:06:50 +0000
Subject: [PATCH 02/11] chore: adding changelog file 5147.maintenance.md
 [dependabot-skip]

---
 doc/changelog.d/5147.maintenance.md | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 doc/changelog.d/5147.maintenance.md

diff --git a/doc/changelog.d/5147.maintenance.md b/doc/changelog.d/5147.maintenance.md
new file mode 100644
index 00000000000..6e838ce327a
--- /dev/null
+++ b/doc/changelog.d/5147.maintenance.md
@@ -0,0 +1 @@
+Increase start_timeout and link it to Preferences -> IdleTimeo…

From 4520940688eb951cd05755aea00df5368fc4221d Mon Sep 17 00:00:00 2001
From: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>
Date: Wed, 20 May 2026 14:08:31 +0000
Subject: [PATCH 03/11] chore: adding changelog file 5147.maintenance.md
 [dependabot-skip]

---
 doc/changelog.d/5147.maintenance.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/changelog.d/5147.maintenance.md b/doc/changelog.d/5147.maintenance.md
index 6e838ce327a..835a23aea4f 100644
--- a/doc/changelog.d/5147.maintenance.md
+++ b/doc/changelog.d/5147.maintenance.md
@@ -1 +1 @@
-Increase start_timeout and link it to Preferences -> IdleTimeo…
+Increase start_timeout and link it to Fluent's Idle timeout

From 268f710c01fa5a18c0bd00db3c153a6868e194f9 Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Wed, 20 May 2026 20:08:04 +0530
Subject: [PATCH 04/11] Update to scheme calls.

---
 .../core/launcher/standalone_launcher.py      | 20 +++++++++----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/src/ansys/fluent/core/launcher/standalone_launcher.py b/src/ansys/fluent/core/launcher/standalone_launcher.py
index dbac5317207..fa8a161506a 100644
--- a/src/ansys/fluent/core/launcher/standalone_launcher.py
+++ b/src/ansys/fluent/core/launcher/standalone_launcher.py
@@ -201,14 +201,17 @@ def __init__(
         if self.argvals["start_timeout"] is None:
             self.argvals["start_timeout"] = 180
         # FLUENT_MAX_IDLE_TIMEOUT is in minutes; start_timeout is in seconds.
-        _idle_timeout_minutes = math.ceil(self.argvals["start_timeout"] / 60)
+        # Just as a safe precaution we are adding an extra minute to the Fluent idle timeout.
+        _idle_timeout_minutes = math.ceil(self.argvals["start_timeout"] / 60) + 1
         # Fluent to self-terminate after start_timeout seconds of idleness so
         # that a failed-connection launch does not leave a stale process behind.
-        _setenv_arg = f"-setenv=FLUENT_MAX_IDLE_TIMEOUT={_idle_timeout_minutes}"
+        _set_timeout_arg = (
+            f"-command=(set-session-idle-timeoutPLF+{_idle_timeout_minutes})"
+        )
         if self.argvals["additional_arguments"]:
-            self.argvals["additional_arguments"] += f" {_setenv_arg}"
+            self.argvals["additional_arguments"] += f" {_set_timeout_arg}"
         else:
-            self.argvals["additional_arguments"] = _setenv_arg
+            self.argvals["additional_arguments"] = _set_timeout_arg
         if self.argvals["lightweight_mode"] is None:
             self.argvals["lightweight_mode"] = False
         fluent_version = _get_standalone_launch_fluent_version(self.argvals)
@@ -306,13 +309,8 @@ def __call__(self):
                     watchdog.launch(os.getpid(), port, password, ip)
             # PyFluent is now connected: disable the idle-timeout guard.
             try:
-                from ansys.fluent.core.services.datamodel_se import (
-                    convert_path_to_se_path,
-                )
-
-                pref = session.preferences.General.IdleTimeout
-                pref.service.set_state(
-                    pref.rules, convert_path_to_se_path(pref.path), 0
+                session.scheme_eval.eval(
+                    f"(set-session-idle-timeout {session.preferences.General.IdleTimeout()})"
                 )
             except Exception as ex:
                 logger.debug(f"Could not reset IdleTimeout preference: {ex}")

From 0790be7fefd2309bfbe35f080c8d0278bca0dcf8 Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Wed, 20 May 2026 20:12:52 +0530
Subject: [PATCH 05/11] Update timeout.

---
 src/ansys/fluent/core/launcher/container_launcher.py |  6 +++---
 src/ansys/fluent/core/launcher/fluent_container.py   |  4 ++--
 src/ansys/fluent/core/session_utilities.py           | 12 ++++++------
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/ansys/fluent/core/launcher/container_launcher.py b/src/ansys/fluent/core/launcher/container_launcher.py
index ba0944a3c1a..9e49abcef5e 100644
--- a/src/ansys/fluent/core/launcher/container_launcher.py
+++ b/src/ansys/fluent/core/launcher/container_launcher.py
@@ -102,7 +102,7 @@ def __init__(
         dimension: Dimension | int | None = None,
         precision: Precision | str | None = None,
         processor_count: int | None = None,
-        start_timeout: int = 60,
+        start_timeout: int = 180,
         additional_arguments: str = "",
         container_dict: dict | None = None,
         dry_run: bool = False,
@@ -146,7 +146,7 @@ def __init__(
             Specifies the number of processors to use. Defaults to ``None``, which uses 1 processor.
             In job scheduler environments, this value limits the total number of allocated cores.
         start_timeout : int, optional
-            Maximum allowable time in seconds for connecting to the Fluent server. Defaults to 60 seconds.
+            Maximum allowable time in seconds for connecting to the Fluent server. Defaults to 180 seconds.
         additional_arguments : str, optional
             Additional command-line arguments for Fluent, formatted as they would be on the command line.
         container_dict : dict, optional
@@ -212,7 +212,7 @@ def __init__(
         }
         self.argvals, self.new_session = _get_argvals_and_session(argvals)
         if self.argvals["start_timeout"] is None:
-            self.argvals["start_timeout"] = 60
+            self.argvals["start_timeout"] = 180
         self.file_transfer_service = file_transfer_service
         if self.argvals["mode"] == FluentMode.SOLVER_ICING:
             self.argvals["fluent_icing"] = True
diff --git a/src/ansys/fluent/core/launcher/fluent_container.py b/src/ansys/fluent/core/launcher/fluent_container.py
index ac9d22fd242..8818ca95e72 100644
--- a/src/ansys/fluent/core/launcher/fluent_container.py
+++ b/src/ansys/fluent/core/launcher/fluent_container.py
@@ -473,7 +473,7 @@ def configure_container_dict(
 def start_fluent_container(
     args: List[str],
     container_dict: dict | None = None,
-    start_timeout: int = 60,
+    start_timeout: int = 180,
     compose_config: ComposeConfig | None = None,
 ) -> tuple[int, str, Any]:
     """Start a Fluent container.
@@ -485,7 +485,7 @@ def start_fluent_container(
     container_dict : dict, optional
         Dictionary with Docker container configuration.
     start_timeout : int, optional
-        Timeout in seconds for the container to start. If not specified, it defaults to 60
+        Timeout in seconds for the container to start. If not specified, it defaults to 180
         seconds.
     compose_config : ComposeConfig, optional
         Configuration for Docker Compose, if using Docker Compose to launch the container.
diff --git a/src/ansys/fluent/core/session_utilities.py b/src/ansys/fluent/core/session_utilities.py
index fff2926411f..540b32acbad 100644
--- a/src/ansys/fluent/core/session_utilities.py
+++ b/src/ansys/fluent/core/session_utilities.py
@@ -69,7 +69,7 @@ def from_install(
         precision: Precision | str | None = None,
         processor_count: int | None = None,
         journal_file_names: None | str | list[str] = None,
-        start_timeout: int = 60,
+        start_timeout: int = 180,
         additional_arguments: str = "",
         env: Dict[str, Any] = {},  # noqa: B006
         cleanup_on_exit: bool = True,
@@ -115,7 +115,7 @@ def from_install(
         journal_file_names : str or list of str, optional
             Path(s) to a Fluent journal file(s) that Fluent will execute. Defaults to ``None``.
         start_timeout : int, optional
-            Maximum time in seconds allowed for connecting to the Fluent server. Defaults to 60 seconds.
+            Maximum time in seconds allowed for connecting to the Fluent server. Defaults to 180 seconds.
         additional_arguments : str, optional
             Additional command-line arguments for Fluent, formatted as they would be on the command line.
         env : dict[str, str], optional
@@ -180,7 +180,7 @@ def from_container(
         dimension: Dimension | int | None = None,
         precision: Precision | str | None = None,
         processor_count: int | None = None,
-        start_timeout: int = 60,
+        start_timeout: int = 180,
         additional_arguments: str = "",
         container_dict: dict | None = None,
         dry_run: bool = False,
@@ -222,7 +222,7 @@ def from_container(
             Specifies the number of processors to use. Defaults to ``None``, which uses 1 processor.
             In job scheduler environments, this value limits the total number of allocated cores.
         start_timeout : int, optional
-            Maximum allowable time in seconds for connecting to the Fluent server. Defaults to 60 seconds.
+            Maximum allowable time in seconds for connecting to the Fluent server. Defaults to 180 seconds.
         additional_arguments : str, optional
             Additional command-line arguments for Fluent, formatted as they would be on the command line.
         container_dict : dict, optional
@@ -289,7 +289,7 @@ def from_pim(
         dimension: Dimension | int | None = None,
         precision: Precision | str | None = None,
         processor_count: int | None = None,
-        start_timeout: int = 60,
+        start_timeout: int = 180,
         additional_arguments: str = "",
         cleanup_on_exit: bool = True,
         dry_run: bool | None = None,
@@ -325,7 +325,7 @@ def from_pim(
             Specifies the number of processors to use. Defaults to ``None``, which uses 1 processor.
             In job scheduler environments, this value limits the total number of allocated cores.
         start_timeout : int, optional
-            Maximum allowable time in seconds for connecting to the Fluent server. Defaults to 60 seconds.
+            Maximum allowable time in seconds for connecting to the Fluent server. Defaults to 180 seconds.
         additional_arguments : str, optional
             Additional command-line arguments for Fluent, formatted as they would be on the command line.
         cleanup_on_exit : bool

From 2dac422edb2fc95a175ef10987dc33eee6117e51 Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Wed, 20 May 2026 20:16:16 +0530
Subject: [PATCH 06/11] Update timeout.

---
 src/ansys/fluent/core/launcher/standalone_launcher.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/ansys/fluent/core/launcher/standalone_launcher.py b/src/ansys/fluent/core/launcher/standalone_launcher.py
index fa8a161506a..2d5eb2c5f07 100644
--- a/src/ansys/fluent/core/launcher/standalone_launcher.py
+++ b/src/ansys/fluent/core/launcher/standalone_launcher.py
@@ -200,11 +200,9 @@ def __init__(
         self.argvals["ui_mode"] = UIMode(ui_mode)
         if self.argvals["start_timeout"] is None:
             self.argvals["start_timeout"] = 180
-        # FLUENT_MAX_IDLE_TIMEOUT is in minutes; start_timeout is in seconds.
-        # Just as a safe precaution we are adding an extra minute to the Fluent idle timeout.
+        # FLUENT_MAX_IDLE_TIMEOUT is in minutes; +1 ensures the minute-granularity
+        # timer never fires before start_timeout elapses, leaving no stale process.
         _idle_timeout_minutes = math.ceil(self.argvals["start_timeout"] / 60) + 1
-        # Fluent to self-terminate after start_timeout seconds of idleness so
-        # that a failed-connection launch does not leave a stale process behind.
         _set_timeout_arg = (
             f"-command=(set-session-idle-timeoutPLF+{_idle_timeout_minutes})"
         )

From 87c262ad58930a6fac2bf4f87055acf13dd77e88 Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Wed, 20 May 2026 21:10:03 +0530
Subject: [PATCH 07/11] Updates.

---
 .../core/launcher/standalone_launcher.py       | 13 +++++++++----
 .../fluent/core/services/app_utilities_v1.py   | 18 ++++++++++++++++++
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/src/ansys/fluent/core/launcher/standalone_launcher.py b/src/ansys/fluent/core/launcher/standalone_launcher.py
index 2d5eb2c5f07..7788d3d82d1 100644
--- a/src/ansys/fluent/core/launcher/standalone_launcher.py
+++ b/src/ansys/fluent/core/launcher/standalone_launcher.py
@@ -307,11 +307,16 @@ def __call__(self):
                     watchdog.launch(os.getpid(), port, password, ip)
             # PyFluent is now connected: disable the idle-timeout guard.
             try:
-                session.scheme_eval.eval(
-                    f"(set-session-idle-timeout {session.preferences.General.IdleTimeout()})"
-                )
+                if session.get_fluent_version() >= FluentVersion.v271:
+                    session._app_utilities.set_idle_timeout(
+                        session.preferences.General.IdleTimeout()
+                    )
+                else:
+                    session.scheme_eval.eval(
+                        f"(set-session-idle-timeout {session.preferences.General.IdleTimeout()})"
+                    )
             except Exception as ex:
-                logger.debug(f"Could not reset IdleTimeout preference: {ex}")
+                logger.debug(f"Could not reset Idle Timeout: {ex}")
             if self.argvals["case_file_name"]:
                 if FluentMode.is_meshing(self.argvals["mode"]):
                     session.tui.file.read_case(self.argvals["case_file_name"])
diff --git a/src/ansys/fluent/core/services/app_utilities_v1.py b/src/ansys/fluent/core/services/app_utilities_v1.py
index cca05189349..591953a2151 100644
--- a/src/ansys/fluent/core/services/app_utilities_v1.py
+++ b/src/ansys/fluent/core/services/app_utilities_v1.py
@@ -96,6 +96,12 @@ def cancel_pause_solve(
         """CancelPauseSolve RPC of Events service (v1)."""
         return self._events_stub.CancelPauseSolve(request, metadata=self._metadata)
 
+    def set_idle_timeout(
+        self, request: AppUtilitiesProtoModule.SetIdleTimeoutRequest
+    ) -> AppUtilitiesProtoModule.SetIdleTimeoutResponse:
+        """SetIdleTimeout RPC of ApplicationRuntime service (v1)."""
+        return self._stub.SetIdleTimeout(request, metadata=self._metadata)
+
 
 class AppUtilities(_AppUtilitiesV0):
     """AppUtilities (v1 proto API)."""
@@ -162,6 +168,18 @@ def is_solution_data_available(self) -> bool:
         response = self.service.is_data_available(request)
         return response.is_data_available
 
+    def set_idle_timeout(self, timeout: int) -> None:
+        """Set the Fluent session idle timeout.
+
+        Parameters
+        ----------
+        timeout : int
+            Idle timeout duration in minutes. Pass 0 to disable the idle timeout.
+        """
+        request = AppUtilitiesProtoModule.SetIdleTimeoutRequest()
+        request.timeout = timeout
+        self.service.set_idle_timeout(request)
+
 
 class AppUtilitiesV252(AppUtilities):
     """AppUtilitiesV252 (v1 proto API).

From 4e77d98ae11165d9f314c71aa9a7aee41b78714d Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Wed, 20 May 2026 22:04:25 +0530
Subject: [PATCH 08/11] Updates.

---
 src/ansys/fluent/core/launcher/standalone_launcher.py | 2 +-
 src/ansys/fluent/core/services/app_utilities_v1.py    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ansys/fluent/core/launcher/standalone_launcher.py b/src/ansys/fluent/core/launcher/standalone_launcher.py
index 7788d3d82d1..e33242096d5 100644
--- a/src/ansys/fluent/core/launcher/standalone_launcher.py
+++ b/src/ansys/fluent/core/launcher/standalone_launcher.py
@@ -309,7 +309,7 @@ def __call__(self):
             try:
                 if session.get_fluent_version() >= FluentVersion.v271:
                     session._app_utilities.set_idle_timeout(
-                        session.preferences.General.IdleTimeout()
+                        session.preferences.General.IdleTimeout() * 60
                     )
                 else:
                     session.scheme_eval.eval(
diff --git a/src/ansys/fluent/core/services/app_utilities_v1.py b/src/ansys/fluent/core/services/app_utilities_v1.py
index 591953a2151..445b479a61b 100644
--- a/src/ansys/fluent/core/services/app_utilities_v1.py
+++ b/src/ansys/fluent/core/services/app_utilities_v1.py
@@ -174,10 +174,10 @@ def set_idle_timeout(self, timeout: int) -> None:
         Parameters
         ----------
         timeout : int
-            Idle timeout duration in minutes. Pass 0 to disable the idle timeout.
+            Idle timeout duration in seconds. Pass 0 to disable the idle timeout.
         """
         request = AppUtilitiesProtoModule.SetIdleTimeoutRequest()
-        request.timeout = timeout
+        request.timeout.seconds = timeout
         self.service.set_idle_timeout(request)
 
 

From fecc98ae7e82ac647deafa137e796adbfe0980a6 Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Tue, 2 Jun 2026 21:34:13 +0530
Subject: [PATCH 09/11] Update ansys-api-fluent's version

---
 pyproject.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index 6d3cac438a2..ab9410bce69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
     "Operating System :: OS Independent"
 ]
 dependencies = [
-    "ansys-api-fluent>=0.3.40",
+    "ansys-api-fluent>=0.3.41",
     "ansys-platform-instancemanagement~=1.1",
     "ansys-tools-common>=0.4.0",
     "ansys-tools-filetransfer>=0.2,<1.0",

From ab03739b4f04231ec2be8183c7427777e89b40bd Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <prmukher@synopsys.com>
Date: Tue, 9 Jun 2026 12:55:34 +0530
Subject: [PATCH 10/11] Update logic.

---
 .../core/launcher/standalone_launcher.py      | 25 +++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/src/ansys/fluent/core/launcher/standalone_launcher.py b/src/ansys/fluent/core/launcher/standalone_launcher.py
index ae92af88db7..e7ef24984c8 100644
--- a/src/ansys/fluent/core/launcher/standalone_launcher.py
+++ b/src/ansys/fluent/core/launcher/standalone_launcher.py
@@ -224,6 +224,15 @@ def __init__(
         self.argvals["ui_mode"] = UIMode(kwargs.get("ui_mode"))
         if self.argvals.get("start_timeout") is None:
             self.argvals["start_timeout"] = 180
+        # +1 ensures the minute-granularity timer never fires before start_timeout elapses.
+        _idle_timeout_minutes = math.ceil(self.argvals["start_timeout"] / 60) + 1
+        _set_timeout_arg = (
+            f"-command=(set-session-idle-timeoutPLF+{_idle_timeout_minutes})"
+        )
+        if self.argvals["additional_arguments"]:
+            self.argvals["additional_arguments"] += f" {_set_timeout_arg}"
+        else:
+            self.argvals["additional_arguments"] = _set_timeout_arg
         if self.argvals.get("lightweight_mode") is None:
             self.argvals["lightweight_mode"] = False
         fluent_version = _get_standalone_launch_fluent_version(self.argvals)
@@ -279,7 +288,7 @@ def __call__(
             try:
                 _await_fluent_launch(
                     self._server_info_file_name,
-                    self.argvals.get("start_timeout", 60),
+                    self.argvals.get("start_timeout", 180),
                     self._sifile_last_mtime,
                     process.pid,
                 )
@@ -294,7 +303,7 @@ def __call__(
                     process = subprocess.Popen(launch_cmd, **self._kwargs)
                     _await_fluent_launch(
                         self._server_info_file_name,
-                        self.argvals.get("start_timeout", 60),
+                        self.argvals.get("start_timeout", 180),
                         self._sifile_last_mtime,
                         process.pid,
                     )
@@ -327,6 +336,18 @@ def __call__(
                         ip,
                         inside_container=False,
                     )
+            # PyFluent is now connected: disable the idle-timeout guard.
+            try:
+                if session.get_fluent_version() >= FluentVersion.v271:
+                    session._app_utilities.set_idle_timeout(
+                        session.preferences.General.IdleTimeout() * 60
+                    )
+                else:
+                    session.scheme_eval.eval(
+                        f"(set-session-idle-timeout {session.preferences.General.IdleTimeout()})"
+                    )
+            except Exception as ex:
+                logger.debug(f"Could not reset Idle Timeout: {ex}")
             if self.argvals.get("case_file_name"):
                 if FluentMode.is_meshing(self.argvals.get("mode")):
                     session.tui.file.read_case(self.argvals.get("case_file_name"))

From cfeddd916eb4baa3f552f96bfcd2a944d12123d0 Mon Sep 17 00:00:00 2001
From: Prithwish Mukherjee <109645853+prmukherj@users.noreply.github.com>
Date: Wed, 10 Jun 2026 13:12:52 +0530
Subject: [PATCH 11/11] Apply suggestion from @prmukherj

---
 src/ansys/fluent/core/launcher/standalone_launcher.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ansys/fluent/core/launcher/standalone_launcher.py b/src/ansys/fluent/core/launcher/standalone_launcher.py
index e7ef24984c8..b4725cff10f 100644
--- a/src/ansys/fluent/core/launcher/standalone_launcher.py
+++ b/src/ansys/fluent/core/launcher/standalone_launcher.py
@@ -227,7 +227,7 @@ def __init__(
         # +1 ensures the minute-granularity timer never fires before start_timeout elapses.
         _idle_timeout_minutes = math.ceil(self.argvals["start_timeout"] / 60) + 1
         _set_timeout_arg = (
-            f"-command=(set-session-idle-timeoutPLF+{_idle_timeout_minutes})"
+            f'-command="(set-session-idle-timeoutPLF+{_idle_timeout_minutes})"'
         )
         if self.argvals["additional_arguments"]:
             self.argvals["additional_arguments"] += f" {_set_timeout_arg}"