Use of z/VSE Job Control Statements for VSE/VSAM

In many jobs, you can omit from your job control the following z/VSE job control statements: // DLBL, // EXTENT, and // ASSGN. Under certain circumstances, however, you may have to explicitly specify EXTENT or ASSIGN statements for the catalogs, (for example, if your program uses CHECKPOINT/RESTART).

• Table 1 shows under which circumstances you have to specify // DLBL statements for job catalogs and user catalogs.
• Table 1 shows under which circumstances you have to specify job control statements for files when you want to run VSE/VSAM applications and want to use IDCAMS commands.