Rollback TPS
A Rollback TPS can only have one Tcl proc.
If in a state the Action TPS returns {ERROR
$mh}
, then DTC calls every Rollback TPS for the current step and all previous
steps in reverse order. The DATA
message of that step
is stored in the staging database as an input argument.
The Rollback TPS should always return {CONTINUE
$mh}
. $mh
is the input DATA
message.