CA TLMS is a victim of CA Vtape failures that was caused by an IBM bug. The IBM bug is corrupting CA Vtape cache DASD VTOCs. The IBM PTF is:
APAR Identifier ...... OA55296 Last Changed ........ 18/05/04
F4 DSCB IN VTOC OVERLAID WITH ZEROS RESULTING IN VOLUME BEING INACCESSIBLE, release 2.3 only
The CTS PTF will stop the S0C1 in the CTSVTAPE module.
PTF SO03737 is available for correction.