extmem.6bd595 Loading DCSS <DCSS name> failed with rc=<return code>
Explanation
The DCSS kernel interface used diagnose call X'64' to load a DCSS. z/VM
failed to load the DCSS and returned an error.
User response
For details about the return codes see the section about DIAGNOSE Code
X'64' in "z/VM CP Programming Services".