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.