Location in the JCL

A SET statement can appear anywhere in the job after the JOB statement with the following restrictions:

It must appear in the job's JCL before the intended use of the symbolic parameter.
It must follow a complete JCL statement.

It cannot appear immediately after the first DD statement within a concatenation.

Examples: The following JCL will work.

	//DD1       DD  DSN=dsnA,DISP=SHR
	//          DD  DSN=dsnB,DISP=SHR
	//         SET  
	//          DD  DSN=dsnC,DISP=SHR

The following JCL will fail.

	//DD1       DD  DSN=dsnA,DISP=SHR
	//         SET  
	//          DD  DSN=dsnB,DISP=SHR
	//          DD  DSN=dsnC,DISP=SHR