Cannot open a window
I am trying to open the Op. Scheds window on this MAU record.

I keep getting this error message

I've reset the user profile that has the record locked, even though they have never been in this record.
Other records are fine, just this one.

Just realised its due to the limitations of one to many vs many to one. i.e an NAU can have multiple Type codes, the only time they are set/unique is when they are defined/given context in a parent record (SRU, INU, etc) so therefore the only way to pull out specific NAU details is from that parent module.