extmem.c55583 Saving a DCSS failed with SAVESEG response code <response-code>
Explanation
The SAVESEG z/VM CP command failed to permanently save changes to a DCSS.
User response
Ensure that the z/VM guest virtual machine is authorized to issue
the CP SAVESEG command (typically privilege class E).
Look for related messages to find the cause of this error. See also message
HCP<response-code>E in the SAVESEG section of the "z/VM CP Command and
Utility Reference".