I have developed many customizations for Dynamics GP over the years.I just upgraded someone to 18.4.1461 and ran into an issue I had not seen before. After applying the 18.4.1461 upgrade the Application.Dynamics.dll had gotten upgraded. I have a customization dll that was not upgraded using that dll. What started to happen was when they would go to print any report and the print dialog box would appear, GP would simply exit. No Windows crash box it would just exit. Rebuilding the customized dll using the upgraded Application.Dynamics corrected this. What in this dll would have caused this behavior? My dll has nothing to do with printing.