VC5.0 UP7 - Error MSB4181

Compiling any programs from a converted project from Netexpress 5.x i become following compile error:

MSB4181 - Die Aufgabe "Cobol" hat "FALSE" zurückgegeben, jedoch keinen Fehler protokolliert. File is MicroFocus.COBOL.CurrentVersion.targets

Traduction from german: The Task "Cobol" have given "FALSE" back, but no error to protocol.

I can't find a error, compiling this with older VC will give no error!

Thanks for help