FUNCTION

The CICS preprocessor FUNCTION option enables you to specify how to handle unsupported CICS functions.
FUNCTION=ABEND
Requests that unsupported functions result in an abend at run time.
FUNCTION=NOOP
Requests that unsupported functions are treated as comments (that is, ignored).

The default is that the CICS preprocessor treats unsupported CICS functions as Compiler errors.