CBR4034I Volume serial number missing.

Explanation
 An error has been detected during Library Automation
Communication Services (LACS) parameter validation processing for
the MOUNT or VERIFY function. The volume serial number has not been
supplied. For a MOUNT request, the volser identifies the volume to
be mounted; for VERIFY, it contains the internal volser read from
the tape volume label.

System action
 The LACS request fails with a parameter error
return code. Messages issued by the caller of LACS are written concurrently
with this message.

System programmer response
 Follow the instructions in the message
descriptions for the messages issued by the caller.

Source
 Object Access Method (OAM)

Routing Code
 Set by the caller.

Descriptor Code
 Set by the caller.