CTRACE

IOS traces events during its processing that may aid in the debugging of problems involving the IOS component. You can use the CTRACE statement in IECIOSxx to identify the SYS1.PARMLIB member that contains the IOS component trace options. If no CTRACE statement is specified, IOS component trace is initialized with default minimum trace options. For more information about IOS component tracing, see z/OS MVS Diagnosis: Tools and Service Aids.

CTRACE(parmlib_member_name)

where parmlib_member_name is an 8-character SYS1.PARMLIB member name which must be in the format CTnIOSxx, where:

n

is an alphanumeric character that specifies the source of the member. IBM-supplied members use “I”.

xx

is any two alphanumeric characters.

Default: None

Note that if the CTRACE parameter is not used, then IOS component tracing is activated to trace minimum operations.

For more information about specifying options for the IOS component trace, or for more information IOS minimum operations see z/OS MVS Diagnosis: Tools and Service Aids. For information about coding the component trace member of SYS1.PARMLIB, see CTncccxx (component trace parameters).

On CTRACE records, you cannot indicate more than one CTRACE specification per record. That is, once "CTRACE(xxxxxxxx)" has been found, the rest of the record is treated as comments.