Thanks, @JMichaelTX , for stating that so well.
@Byrein You could set up the "if" part in in KMFAM to make it easy to replicate. You could use the %ExecutingThisMacro% token to make a generic error message that could help pinpoint the issues.
Regarding actually logging the errors, I had forgotten about this set of macros I wrote, which I still use: Write to Log File. Let me know if you need help with them - I can show you how I use them.