A program cannot release the storage that was obtained for subspaces until it issues the IARSUBSP macro with the UNIDENTIFY parameter. If it attempts to free the storage before issuing IARSUBSP UNIDENTIFY, the program will abnormally end with system completion code A05, A0A, or A78. See z/OS MVS System Codes for information about those codes.

Use the STORAGE macro with the RELEASE parameter to release the storage that you obtained for the subspaces. You can also use the FREEMAIN macro, but STORAGE has fewer requirements and restrictions and is easier to use.

Free the storage by specifying on the SP parameter the subpools you obtained for your subspace storage.