The following error message is being thrown when you attempt to print a report in DRM.
CrystalDecisions.Shared.CrystalReportsException: Load report failed.—> System.Runtime.InteropServices.COMException (0x80041811): Unsupported Operation. A document processed by the JRC engine cannot be opened in the C++ stack
This error indicates that you probably have the Crystal Report open in the Business Objects Crystal Designer. Just close it and you should be good to go!