A COBOL job runs successfully with Compress. When the dataset is no longer defined in Compress, the same program receives IGZ0204W and IGZ0035S open errors. This is due to the REFCM in the dataset not matching the COBOL RECORDING MODE in the program accessing the file.
A sample job setup with Compress:
The job runs successfully.
A sample job setup without Compress:
The job fails with COBOL messages IGZ0204W and IGZ0035S. These messages indicate you cannot open a RECFM=FB dataset using RECFM=VB access in the COBOL program.
Compress 5.5
There are two possible resolutions to this issue.