The programs handled by the CICS preprocessor must respect the following conditions, or else run the risk of producing errors at compile or Runtime.

1. CICS Runtime must be installed. Some technical header files used by prepro-cics-C.pl are delivered under include directory in CICS Runtime module.
2. prepro-cics-C.pl does not support "TSAM call path for CICS and DB" functions.
3. If the program contains "EXEC SQL" statements, the preprocessor is asked to be executed ahead of db pre-complier commands (db2 prep for IBM UDB or pro*C for Oracle DB).