Gao, Your SYSTEM CONFIG (on the MAINT 0CF1) probably contains: CP_Access MAINT CF1 A
Normally you want to issue "CPREL A" before you update the parm disk, followed by a "CPACC MAINT 0CF1 A" to reaccess it again. But you can also change the SYSTEM CONFIG line into: CP_Access MAINT CF1 A RR That will make CP link its parm disk with RR instead of the default SR and will allow you to update the disk while CP still has it accessed. The normal single writer, multiple reader rules for CMS disks apply, so it is your foot and your gun. And don't forget to let CP know that you updated the disk by issueing a "CPACC MAINT CF1 A RR". Ronald van der Laan
