When it creates a subspace, the system returns an STOKEN for the subspace. Save the subspace STOKEN returned to your program. You must provide the STOKEN when adding an access list entry for the subspace. A program cannot run in a subspace until the server program uses the STOKEN to add an access list entry to its task's DU-AL.

You also must supply the subspace STOKEN to associate and disassociate storage with a subspace, and to delete the subspace after your application program has run.