AHL909I

Explanation
During trace writer initialization, an incorrect
DD statement caused processing of a trace data set to fail.
In
the message text: ddname
The ddname.

System action
Trace writer initialization will continue processing
the remaining trace data sets.  If none of the trace data sets are
valid the trace writer will end; otherwise, the trace writer will
continue processing using the valid trace data sets to contain the
trace data.

Operator response
Record the message and notify the system programmer.

System programmer response
Ensure that the DD statement for the
specified DDNAME is valid.

Source
Generalized trace facility (GTF)

Module
AHLWINIT