This is where I really love mainframes. The errors all contain a consistent code and a description. The codes are all published, are easy to find nowadays,

This is where I really love mainframes. The errors all contain a consistent code and a description. The codes are all published, are easy to find nowadays, and have generally good documentation attached to them. Here's an IBM example, for just a single OS facility: https://www.ibm.com/docs/en/SSLTBW_2.4.0/pdf/hasa100_v2r4.pdf https://www.ibm.com/docs/en/SSLTBW_2.4.0/pdf/hasa100_v2r4.pd...