ISPF commands/macros are popular while editing files/programs/jcls in PDS members, Endevor and Changeman.
In my previous lot I have given some commands.
PACK- This is one of the most important profile command. I will give more details on it.
Pack OFF ==> It decompress the data. So this will not a problem. The data will be saved as we entered.
Pack ON==> Data will be compressed. Because of this some special characters will be included in the Programs/Jcls. Especially when working with JCLs, the pack ON mode causes, job abend.
When we are working with, Chgman and Endevor, after editing of program/JCLs, we need to make sure that “Pack OFF”
Attention to developers is:
- with the pack on, we can save memory on DASD
- when the program/JCL, earlier is in PACK OFF mode, after editing also it saves as PACK OFF. In the same way for PACK ON.
- the advantage is we can save SPACE
- disadvantage is, when Files/JCLS with PACK ON mode, can not execute directly, so we will get abend.