Turning on a CAF trace
CAF does not capture any diagnostic trace messages unless you tell it to by turning on a trace.
Procedure
To turn on a CAF trace:
Allocate a DSNTRACE data set either dynamically or by including
a DSNTRACE DD statement in your JCL.
CAF writes diagnostic
trace messages to that data set. The trace message numbers contain
the last three digits of the reason codes.