Hi Mauricio,
All reports that print out of Adagio use the version 7.0 Crystal print engine. This includes the 'Custom Reports'. But you created a report using Crystal Reports for Adagio 8.5. what this means is that you can do a report that works just fine in the Crystal designer program, yet because there is at least one '8.0' feature in the report, the older print engine doesn't know what to do with that feature. Thus the reason for the 'screen flash' when attempting to print the report via the Custom Reports menu.
At the current time, there isn't anything I can guarantee to make the report run 'as is'. Essentially the solution is to remove whatever the '8.0' features are in the report, and that can be difficult to determine. The best I can offer is to try re-opening the report in the Crystal designer program and attempt to save the report as a Crystal 7.0 version report. Do this from the File / Save As menu, and choose the File Type of version 7.0.
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Regards,
Softrak Tech Support