Spool number range and status
If your spool system for printing is getting out of numbers, the printing stops and even endangers your complete system. The signal is shortdump COMPUTE_BCD_OVERFLOW as described in OSS note 2208342 – Shortdump COMPUTE_BCD_OVERFLOW.
Checking spool number range can be done via program
RSPO_SHOW_SPO_NUM . Background is in OSS note 2635724 – Monitor or Display Spool Range Limit and Status.
To solve spool number range issues follow the instructions in OSS note 48284 – System cannot generate any more spool requests.
Avoiding large spool in background job output
If you have a batch job with large spool output and you never look at it, you can also setup device type NULL to immediately delete the output. This way the spool system is not filled up. For setup see this blog.
Transaction SPOOL contains links to most important spool transactions. See this dedicated blog.