COBCH1238 Conflict with REENTRANT directive and user code or other directives

The Compiler has rejected the REENTRANT directive as it contains syntax that is not compatible with reentrant programs.

The REENTRANT directive is rejected if the program contains any of the following syntax elements:

ALTER statements
Debug facility (SOURCE-COMPUTER...WITH DEBUGGING)
ON statements
Segmentation
Any of the following directives:
- PROTECT-LINKAGE
- STICKY-LINKAGE
- STICK-PERFORM

Also, if you are using the PROGRAM-ID. … IS INITIAL statement, you cannot use REENTRANT"1", and can only use REENTRANT "2" if the program does not contain nested programs.