I changed the report printer in the Crystal Report to AdagioPDF & re-saved the file.
(And just to be sure, I uninstalled on my laptop the ODBC and re-installed.)
The report is saved to C:\SOFTRAK\Receivables\CustomReports
In Adagio AR, I ran the report twice from two separate companies (different clients' data), but the end result is that we still receive: "Unspecified error"
When I run the same report from Crystal, the report runs properly.