The IEC501A mount messages and other mount/dismount messages are not being intercepted by CA 1, so the TMSnnn messages are not being produced. Without our interception of the message some devices may not be able to mount the correct tape, and scratch subpooling will not work.
These message are being suppressed via an MPF exit or via an MFA rule being sent to a EMCS console.
DO NOT suppress these messages. CA 1 does not intercept and process the message if another subsystem or MFP exit is suppressing it before we see the message.
CA 1 intercepts the following messages
IAT5210
IAT5624
IEC101A
IEC501A
IEC501E
IEC502E
IEC507D
IEC534D
IEC704A
IEF233A
IEF233D
IEF234E
Mount messages issued for drives in an IBM ATL/VTS device are issued as suppressed by IBM and will not be prefixed with a TMSxxx message ID. This is the IBM standard for their messages.