Developer for System z Enterprise COBOL for z/OS, Version 4.1, Compiler and Runtime Migration Guide
Corrective action for the ALPHABETIC class:
Use the ALPHABETIC-UPPER class test under NOCMPR2 to get the same function
as the ALPHABETIC class test under CMPR2. The ALPHABETIC-UPPER class under
NOCMPR2 consists of the 26 uppercase letters and the space.