Powerbuilder 12.6 application crash after migrating from Powerbuilder 11

In Powerbuilder 11 build - 6525, the application works fine.

After migrating from Powerbuilder 11 to 12.6 build 3506, the application crashes on opening.

Error - APPCRASH

Fault Module Name: PBVM126.dll

Fault Module Version: 12.6.0.3506

There were no errors during migration and build. On accessing the application, the application crashes with above error.

Thanks,

Poornima