Hi,

Doing some more tinkering I discovered the memories 800 to 849, being read by Chirp as bank A, are actually the band edge scan memory pairs.  These are used by the IC-92AD to scan a band of frequencies by setting the upper and lower limits.  Some scanners used the term "limit scan".

This  means they don't have _bank attributes yet Chirp is trying to read bank attributes for them, hence the error: AttributeError: Memory instance has no attribute '_bank