All storage that has been made eligible to be assigned to a subspace must be specified on an IARSUBSP UNIDENTIFY request before it can be released. The server program must invoke the IARSUBSP macro with the UNIDENTIFY parameter, and specify the storage range in the range list.

The system disassociates the storage from the subspace before making the storage ineligible to be assigned to a subspace, if the server program has not already done so.