If you have just upgraded from AR 8.1 to AR 9.0 and are running GlasPak, the chart of accounts will not be the only file it cannot find. It also won't be able to find your customer master (ARCUST) when it goes looking, as the name of that file has changed in the new version. You will have to change the way that you integrate Glaspak and Adagio Receivables. Instead of having GlasPak read those files directly, you will have to enter the information it's looking for manually.
The import file that GlasPak creates of the invoices it generates should still be able to be retrieved by Adagio Receivables. That process hasn't changed.
I seriously recommend talking to an Adagio consultant about the changes between the two versions. Did you read the Release Notes for all the intermediate versions before installing the upgrade?
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Andrew Bates