Hi PwC,
What version of Adagio Payables is in use, for you and for your client? If AP is version 8.1E, you can edit the vendor and on the Payee/PO tab, set the allowed methods for a vendor to receive a PO document. If you remove the Print option here, then attempt to print a PO for this vendor, you will receive that same 'nothing to print' message. This is a setting in the data, so if you took a backup of their data after seeing their problem and on the same PO they tried to print, then the behavior would be the same with their data in your office.
Is the PO document 'Completed'? Completed POs cannot be printed and give the same error. Again, this is a setting in the data and would give the same behavior if the data was backed up and investigated from a different location.
If your clients data works correctly for printing in your office, perhaps you can try having the client access sample data and print/preview a non-Completed PO, to see if that works and ensure that the program installation completed successfully.
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Regards,
Softrak Tech Support