3155 (0C53) (RC3155): MQRCCF_SUBSCRIPTION_IN_USE

Explanation

The subscription is in use.

An attempt to modify or deregister a subscription was attempted by a member of the identity set when they were not the only member of this set.

Programmer response

Reissue the command when you are the only member of the identity set. To avoid the identity set check and force the modification or deregistration remove the subscription identity from the command message and reissue the command.