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.
z/OS 2.3 TLMS VTAPE
TEST PTF SO03737 is available for correction. Please contact CA support for PTF or download from SUPPORT.CA.COM..