CBR4066I Token mount request not found.

Explanation
 An error has been detected during Library Automation
Communication Services (LACS) processing for the WAIT, VERIFY, or
CANCEL function for a library-resident tape drive. The mount request
represented by the LACS token is not pending execution on the drive,
nor is it the most recently completed order on the drive.

System action
 The LACS request fails with an environmental
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.