Set Trace (QWTSETTR) API

Required Parameter Group:

1	Job name	Input	Char(10)
2	User name	Input	Char(10)

Optional Parameter:

Error code

I/O

Char(*)

Default Public Authority: *USE

Threadsafe: No

The Set Trace (QWTSETTR) API starts a Trace Job (TRCJOB) command for the job passed on the parameter at the earliest point while the job is starting. This allows tracing of jobs early in the life of a job to help debug problems that could not have been done earlier because a user could not enter the command until the job was actually started.

The QWTSETTR API sets up the information about the job so that when that job is started a trace will begin.

The QWTSETTR API can be called multiple times to set up traces for multiple jobs. When the tracing is finished, the Control Trace (QWTCTLTR) API should be called using the *RESET value for the control value parameter to clear out all the job names. The Control Trace (QWTCTLTR) API must be called to turn on this trace activity.

The information set up by the QWTSETTR API will be in effect during an initial program load (IPL).

The information set up by the QWTSETTR API does not work for active jobs, but only for jobs that have not started yet.

If a job ends while the trace activity is running for that job, the trace information will be dumped to a spooled file.

The Trace Job (TRCJOB) command is issued in the job as if a user had typed in the command; therefore, the user (user name parameter) must have authorization to the TRCJOB command for this to work properly.

This API should be used only when recommended by an IBM service representative for collecting information for problems that occur early in job initiation.

Authorities and Locks

The user (user name parameter) must have authorization to the TRCJOB command for this to work properly.

Required Parameter Group

Job Name: INPUT; CHAR(10)
The name of the job that will be traced.
User Name: INPUT; CHAR(10)
The name of the user that will be traced.

Optional Parameter

Error code: I/O; CHAR(*)
The structure in which to return error information. For the format of the structure, see Error Code Parameter. If this parameter is omitted, diagnostic and escape messages are issued to the application.

Error Messages

Message ID	Error Message Text
CPF24B4 E	Severe error while addressing parameter list.
CPF3C90 E	Literal value cannot be changed.
CPF3CF1 E	Error code parameter not valid.
CPF9872 E	Program or service program &1 in library &2 ended. Reason code &3.

API introduced: V2R3

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