Hi David,
Adagio loads dictionaries from the \softrak\dict directory, and a '1212' error is indicative of one or more required dictionaries being mis-dated or missing. Does your client use any other Adagio programs in addition to Ledger and Receivables?
To start with, check the file dates of the @R90AI.ssi and @R90AR.ssi files - these are the Receivables 90A dictionaries. If either are missing or have a file date different than March 19, 2009, this is the problem. You would need to get everyone out of Adagio programs, remove these 2 files, and re-install the Receivables upgrade.
I assume that when you mentioned that the integrity check was clean, you are referring to using Adagio Receivables 81A and a back-up of the data prior to conversion. This error is not related to the data.
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Regards,
Softrak Tech Support