Report offending input in sequence module error messages

pulser-core/pulser/sequence/_schedule.py

@@ -258,7 +258,9 @@ def __getitem__(
         self, key: Union[int, slice]
     ) -> Union[_TimeSlot, list[_TimeSlot]]:
         if key == -1 and not self.slots:
-            raise ValueError("The chosen channel has no target.")
+            raise ValueError(
+                f"The chosen channel ({self.channel_id!r}) has no target."
+            )
         return self.slots[key]
 
     def __iter__(self) -> Iterator[_TimeSlot]:
@@ -290,7 +292,7 @@ def get_samples(
         if qubits is None:
             raise ValueError(
                 "'qubits' must be defined when extracting the samples of a"
-                " DMM channel."
+                f" DMM channel; got None for channel {self.channel_id!r}."
             )
         return DMMSamples(
             **init_fields, detuning_map=self.detuning_map, qubits=qubits
@@ -714,7 +716,7 @@ def _check_duration(
         if self.max_duration is not None and t > self.max_duration:
             msg = (
                 "The sequence's duration exceeded the maximum duration allowed"
-                f" by the device ({self.max_duration} ns)."
+                f" by the device ({self.max_duration} ns); got {t} ns."
             )
             if block_over_max_duration:
                 raise RuntimeError(msg)

pulser-core/pulser/sequence/_seq_drawer.py

@@ -1018,8 +1018,14 @@ def _draw_qubit_content(
             for ch, ch_obj in sampled_seq._ch_objs.items()
         ]
     ):
+        wrong_basis = {
+            ch: ch_obj.basis
+            for ch, ch_obj in sampled_seq._ch_objs.items()
+            if ch_obj.basis != "ground-rydberg"
+        }
         raise NotImplementedError(
-            "Can only draw qubit contents for channels in rydberg basis."
+            "Can only draw qubit contents for channels in the "
+            f"'ground-rydberg' basis; got {wrong_basis}."
         )
     # Gather data per targeted qubits
     total_duration = data["total_duration"]