Most Common Issue
If the report is open in the full version of Crystal Reports, then close the report in the designer. Setup two folders for reports; one for editing, and one for users to view. The designer will lock the report where it can't be opened our software.
This issue effects The Report Viewer 5, The Report Viewer Pro, and other versions of our software.
When opening a .RPT in The Report Viewer Pro, you may get the following error:
System.Runtime.InteropServices.COMException (0x80041811): Unsupported Operation. A document processed by the JRC engine cannot be opened in the C++ stack. at CrystalDecisions.ReportAppServer.ClientDoc.ReportClientDocumentClass.Open(Object& DocumentPath, Int32 Options) at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.Open(Object& DocumentPath, Int32 Options) at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened()
This seems to be a catchall error in the Crystal Runtime. The comments include some other solutions. There is also a post about it in the forum.
The most common cause for this error is that the report is already open in a full version of Crystal Reports.
Multiple users are still able to view any given report with The Report Viewer; however, reports open with the full Crystal Reports designer will be locked such that it can't be opened by The Report Viewer.