If the chain you are breaking is invalid, you must issue the UPV command for each volume of the chain in the following format:
UPV vvvvvv,EXPDT=60001
Where:
Represents the volume serial number.
If an invalid chain is established, but the data set statistics are correct, then only the chaining information needs to be corrected. This command resets all volume/data set chain pointers and initializes the volume sequence, volume count, file sequence and file count to one, but leaves all data set information intact for the first data set (only) on the volume.
Important! Exercise extreme caution when using this command. If all volume/data set chains are not properly cleared and reset, illogical chaining conditions may result which could cause unpredictable results. Be advised to consult with CA CA TLMS support personnel before using this command.
Example
If processing is bypassed for a volume that is part of a chain and that volume is used as input or concatenated with other volumes, it becomes a volume in two chains. This is an example of an incorrectly established chain. To resolve this chaining error, use the UPV vvvvvv,EXPDT=60001 command to break the chain; issue the command for each volume belonging to the invalid chain.
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