Dual expression preview no longer works in beta 0.1.568.0+

[nagotown]

Acknowledgement

• I have read Getting-Started and FAQ
• If dealing with version 0.1.549 or higher, you have installed the .NET 8 runtime

🐛 Describe the bug

Dual expression preview no longer works in beta 0.1.568.0 and main.

Explains how to reproduce the bug

OS & Version

Windows 10

Logs

Click to open log

2026-05-29 20:24:38.492 -07:00 [INF] Logging initialized.
2026-05-29 20:24:38.559 -07:00 [INF] Microsoft Windows NT 10.0.19045.0
2026-05-29 20:24:38.561 -07:00 [INF] Microsoft Windows 10.0.19045 X64 X64
2026-05-29 20:24:38.561 -07:00 [INF] OpenUtau v0.1.568.0 win-x64
2026-05-29 20:24:38.561 -07:00 [INF] Data path = D:\vocal synth\Editors\OU_testing\1.568
2026-05-29 20:24:38.561 -07:00 [INF] Cache path = D:\vocal synth\Editors\OU_testing\1.568\Cache
2026-05-29 20:24:38.562 -07:00 [INF] System encoding = shift_jis
2026-05-29 20:24:39.184 -07:00 [INF] Initializing application.
2026-05-29 20:24:39.257 -07:00 [INF] Initializing culture.
2026-05-29 20:24:39.262 -07:00 [INF] Initialized culture.
2026-05-29 20:24:39.262 -07:00 [INF] Initializing theme.
2026-05-29 20:24:39.271 -07:00 [INF] Initialized theme.
2026-05-29 20:24:39.271 -07:00 [INF] Initialized application.
2026-05-29 20:24:39.271 -07:00 [INF] Framework initialization completed.
2026-05-29 20:24:39.436 -07:00 [INF] Initializing OpenUtau.
2026-05-29 20:24:39.437 -07:00 [INF] Searching singers.
2026-05-29 20:24:39.443 -07:00 [INF] Search all singers: 00:00:00.0034644
2026-05-29 20:24:39.475 -07:00 [INF] Search all plugins: 00:00:00.0303893
2026-05-29 20:24:39.475 -07:00 [INF] Search all legacy plugins: 00:00:00.0002934
2026-05-29 20:24:39.476 -07:00 [INF] Initialized OpenUtau.
2026-05-29 20:24:39.476 -07:00 [INF] Initializing audio.
2026-05-29 20:24:39.477 -07:00 [INF] ReleaseSourceTemp D:\vocal synth\Editors\OU_testing\1.568\Cache
2026-05-29 20:24:39.519 -07:00 [INF] Initialized audio.
2026-05-29 20:24:39.527 -07:00 [INF] Creating main window.
2026-05-29 20:24:39.604 -07:00 [INF] Initialized main window component.
2026-05-29 20:24:39.694 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:39.725 -07:00 [INF] Publish notification Load project
2026-05-29 20:24:39.731 -07:00 [INF] Main window checking Update.
2026-05-29 20:24:39.731 -07:00 [INF] Created main window.
2026-05-29 20:24:41.247 -07:00 [INF] Checking update at: https://github.com/stakira/OpenUtau/releases/tag/0.1.568
2026-05-29 20:24:41.247 -07:00 [INF] Checking appcast: https://github.com/stakira/OpenUtau/releases/download/0.1.568/appcast.win-x64.xml
2026-05-29 20:24:41.438 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:41.448 -07:00 [INF] Publish notification Load project
2026-05-29 20:24:43.039 -07:00 [INF] undoGroup started
2026-05-29 20:24:43.039 -07:00 [INF] ExecuteCmd Add part
2026-05-29 20:24:43.053 -07:00 [INF] undoGroup ended
2026-05-29 20:24:43.054 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:43.054 -07:00 [INF] Publish notification Pre-render notification.
2026-05-29 20:24:43.057 -07:00 [INF] undoGroup started
2026-05-29 20:24:43.057 -07:00 [INF] Publish notification Phonemized
2026-05-29 20:24:43.108 -07:00 [INF] ExecuteCmd Move parts
2026-05-29 20:24:43.109 -07:00 [INF] Publish notification Phonemized
2026-05-29 20:24:43.116 -07:00 [INF] ExecuteCmd Move parts
2026-05-29 20:24:43.117 -07:00 [INF] Publish notification Phonemized
2026-05-29 20:24:43.133 -07:00 [INF] ExecuteCmd Move parts
2026-05-29 20:24:43.133 -07:00 [INF] Publish notification Phonemized
2026-05-29 20:24:43.149 -07:00 [INF] ExecuteCmd Move parts
2026-05-29 20:24:43.149 -07:00 [INF] Publish notification Phonemized
2026-05-29 20:24:43.302 -07:00 [INF] undoGroup ended
2026-05-29 20:24:43.302 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:43.302 -07:00 [INF] Publish notification Pre-render notification.
2026-05-29 20:24:44.093 -07:00 [INF] undoGroup started
2026-05-29 20:24:44.429 -07:00 [INF] undoGroup ended
2026-05-29 20:24:44.429 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:44.429 -07:00 [INF] Publish notification Pre-render notification.
2026-05-29 20:24:44.500 -07:00 [INF] undoGroup started
2026-05-29 20:24:44.548 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.550 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.551 -07:00 [INF] Publish notification Select expression pitd
2026-05-29 20:24:44.551 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.552 -07:00 [INF] Publish notification Select expression clr
2026-05-29 20:24:44.552 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.553 -07:00 [INF] Publish notification Select expression eng
2026-05-29 20:24:44.553 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.554 -07:00 [INF] Publish notification Select expression vel
2026-05-29 20:24:44.554 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.554 -07:00 [INF] Publish notification Select expression vol
2026-05-29 20:24:44.555 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.555 -07:00 [INF] Publish notification Select expression atk
2026-05-29 20:24:44.556 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.556 -07:00 [INF] Publish notification Select expression dec
2026-05-29 20:24:44.557 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.557 -07:00 [INF] Publish notification Select expression gen
2026-05-29 20:24:44.557 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.558 -07:00 [INF] Publish notification Select expression bre
2026-05-29 20:24:44.589 -07:00 [ERR] undoGroup already started
2026-05-29 20:24:44.590 -07:00 [INF] undoGroup ended
2026-05-29 20:24:44.590 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:44.590 -07:00 [INF] Publish notification Pre-render notification.
2026-05-29 20:24:44.590 -07:00 [INF] undoGroup started
2026-05-29 20:24:44.590 -07:00 [INF] undoGroup ended
2026-05-29 20:24:44.590 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:44.590 -07:00 [INF] Publish notification Pre-render notification.
2026-05-29 20:24:44.591 -07:00 [INF] undoGroup started
2026-05-29 20:24:44.591 -07:00 [INF] undoGroup ended
2026-05-29 20:24:44.591 -07:00 [INF] SchedulePreRender
2026-05-29 20:24:44.591 -07:00 [INF] Publish notification Pre-render notification.
2026-05-29 20:24:44.765 -07:00 [INF] Created bitmap 717, 60
2026-05-29 20:24:44.816 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.817 -07:00 [INF] Publish notification Select expression pitd
2026-05-29 20:24:44.817 -07:00 [INF] Publish notification Select expression clr
2026-05-29 20:24:44.817 -07:00 [INF] Publish notification Select expression eng
2026-05-29 20:24:44.818 -07:00 [INF] Publish notification Select expression vel
2026-05-29 20:24:44.818 -07:00 [INF] Publish notification Select expression vol
2026-05-29 20:24:44.818 -07:00 [INF] Publish notification Select expression atk
2026-05-29 20:24:44.819 -07:00 [INF] Publish notification Select expression dec
2026-05-29 20:24:44.819 -07:00 [INF] Publish notification Select expression gen
2026-05-29 20:24:44.819 -07:00 [INF] Publish notification Select expression bre
2026-05-29 20:24:44.820 -07:00 [INF] Publish notification Load part
2026-05-29 20:24:44.820 -07:00 [INF] Publish notification Select expression pitd
2026-05-29 20:24:44.820 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:44.862 -07:00 [ERR] No active undoGroup to end.
2026-05-29 20:24:49.613 -07:00 [INF] Publish notification Select expression pitd
2026-05-29 20:24:50.200 -07:00 [INF] Publish notification Select expression dyn
2026-05-29 20:24:50.649 -07:00 [INF] Publish notification Select expression pitd
2026-05-29 20:24:53.173 -07:00 [INF] Exiting.
2026-05-29 20:24:53.176 -07:00 [INF] Exited.