extmem.cb0afe <DCSS name> needs used memory resources and cannot be loaded or queried
Explanation
You cannot load or query the DCSS because it overlaps with an already
loaded DCSS or with the memory of the z/VM guest virtual machine
(guest storage).
User response
Ensure that no DCSS is loaded that has overlapping memory resources
with the DCSS you want to load or query. If the DCSS overlaps with guest
storage, use the DEF STORE CONFIG z/VM CP command to create a sufficient
storage gap for the DCSS. For details, see the section about the DCSS
device driver in "Device Drivers, Features, and Commands".