4.9. Special considerations for COBOL users and SMB
This was added to provide some insight for COBOL users.
4.9.1. COBOL users take note
Note: This information was provided by Helen Witter.
Try to keep in mind is that COBOL is written for NSR processing. If anything is done to switch the processing to LSR (whether OEM, SMB or BLSR), the program or COBOL may not be able to handle it. The good news is that SMB can be disabled for a particular program by coding an override on the DD card and letting other files that access the dataset continue to use SMB. The most common problem is a positioning error. With NSR processing, implicit positioning by VSAM to the first record in the file is done on the first sequential GET. Many programs (especially ...
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