Front-End version checking

Genero 4.01 is now more strict regarding front-end.

Starting with version 4.01, the front-end X.YY version must match the runtime system version X.YY:
  • FGL 4.01 + FE 4.01 is allowed
  • FGL 4.01 + FE 4.00 is denied

If the versions do not match, the runtime raises error -8141 and the program stops.