CBR3961I Volume volser not found in controller map by remap of library library-name.
Explanation
During the remap of library library-name, volume volser was found in the volume table but was not found in the controller map (outboard inventory). If the remap request originated in ISMF, this message is issued to the TSO user ID of the storage administrator who initiated the remap request for this library.
System action
The volume record is updated to reflect that volume volser is lost, shelf-resident and in a pseudo library. This volume's opposite side is also updated with the same information.
System programmer response
Take inventory of shelf volumes to locate missing volume.
Source
Object Access Method (OAM)
Routing Code
2,4,6
Descriptor Code
4