GETMAIN failed. The user must logon with a larger region.

NOT ENOUGH MAIN STORAGE TO CHANGE FOR USERID user_id

GETMAIN failed attempting to read in the user_id. The user must logon with a larger region.

NOT ENOUGH SPACE TO CHANGE FOR USERID user_id

There is not enough space within the blocks allotted for this user_id. Issue the ADD subcommand of ACCOUNT to provide more space, then reissue the CHANGE subcommand.