IBM Mainframe Forum

What is the maximum # of files(like in select and assign, with matching JCL at the bottom) allowed in Cobol using the IBM Mainframe, with z/OS? I have searched with no luck. This is my first post, so I apologize for the newbie question. Thanks

You can always search these forums until you find a previous topic like this one.

Or, review the JCL Reference Guide under the section on the DD statement.

thank you for your time, and sorry for the essential repost.

You will likely hit a REGION problem due to default 5 buffer allocation per file before reaching the max number of files, unless you're doing special things.