Solved
runtime error due to subfolder used under script
After upgrade to 15.78.12.7 this version on import python looking for the file directly under script folder else throwing error Actually we kept our script in multiple directories next to script...
There's a known issue with Python 3.13 that comes with TestComplete v.15.77, discussed here TestComplete 15.77 is broken - dont upgrade | SmartBear Community , which has not been fixed yet.
