STEPS TO REPRODUCE
1. Launch iClone 6.42
2. Apply G5 character Chuck and apply TTS to create Viseme data, and save it to desktop
3. Restart iClone 6.42, load the saved project
4. Navigate to Timeline > Chuck > Viseme
5. Go to Frame 100, right-click and select “Break”, then delete all the Lip keys on the second clip and save the project
6. Launch iClone 6.5, load the project on step 5
7. Pick Chuck, replace by Mason

ACTUAL RESULT
Program closed automatically without crash message

EXPECTED RESULT
Program can work normally