Designating subset pointers
To use subset pointers in your program, you must know the numbers for the pointers as they were defined in the PSB.
Then, when you use the subset pointer options, you specify the number for each subset pointer you want to use immediately after the option; for example, you would use P3 to indicate that you want to retrieve the first segment occurrence in the subset defined by subset pointer 3. No default exists, so if you do not include a number between 1 and 8, IMS considers your qualification statement invalid and returns an AJ status code to your program.