DFS1196I /ASSIGN FAILED. SAVE KEYWORD REQUIRED IF USER DOES NOT EXIST WITH RM

Explanation

If this IMS system is part of a sysplex using the IMS Resource Manager and the destination user does not exist, the /ASSIGN command is rejected. Also, the user might be immediately deleted, and the assignment would be incomplete. If the /ASSIGN command is issued with the SAVE keyword, the assignment persists for the user until another /ASSIGN command is issued with the NOSAVE keyword.