Using the LOCK command

CICS also installs resource definitions in the CSD during an initial or cold start, from the list of groups defined on the GRPLIST system initialization parameter. To control the addition of resource groups to the CICS startup group list, you should use the CEDA LOCK command to lock the list. This protects the group list from unauthorized additions. Also, lock all the groups that are specified in this list.

Note: The OPIDENT of the signed-on user is used as the key for the CEDA LOCK command and the CEDA UNLOCK command.