We were on build 2.0.0155, several years behind on updates, and recently caught up. Overall things are working smoothly, however now when making notes on a customer invoice (shift + F9), after filling in the Transaction Information window and hitting enter we receive a message box which says "Run-time error '91': Object variable or With block variable not set.
From what I can tell, this error can be caused by many things. Any ideas on what could be causing it or steps I can take to fix it?