Problem:

Compiling PROGRAM1.CBL with PROGRAM1.CPY as a copybook fails with "COBCH0056S COPY is recursive"

[PROGRAM1.CBL]

...

        COPY PROGRAM1.

...

Resolution:

COPYEXT(CBL,CPY) is a default compiler directive that causes the compiler to pick up a copybook with CBL extension first. In a case where the copybook has the same name as the program, the compiler will pick up the program itself.

To avoid this, here are two options:

1. set COPYEXT(CPY) to pick up copybooks with CPY extension first, or

2. rename the copybooks that have the same names as programs