On what kind of system are working with?
I have a customer, and with Solaris and TSM... he had such behaviour from time to time, and we found out that sometime TSM on Solaris has *X-Files music* some strange and mysterious bugs...
*Fading of the X-Files music....*
So maybe, it would be worth to check the TSM logs to see if you have some messages, that might have not been transmitted to CMOD.
Cheers,
Alessandro