Unable to export Report as PDF from Visual Studio 2010 / C#

Dear all

I am trying to create a simple console-based C# application that opens crystal reports and exports them as PDF files. I've found many examples for this on the web but I just can't get it to work. It compiles without errors/warnings but crashes at runtime.

I'm using Crystal Report 11.0.0.1282 and Visual Studio 2010 with .Net framework 4.5 on Windows 7, 64bit.

cryRpt = newReportDocument();

cryRpt.Load("test.rpt");

Then I get:

System exception: 'COMM_FAILURE'

Reason: error number WSAEINVAL

Completed: no

Minor code: 1330577413 (socket() failed)

If I then try to export the report:

cryRpt.ExportToDisk(ExportFormatType.PortableDocFormat,  "test.pdf");

The program crashes:

System.TypeLoadException: Method 'ISCREditableRTFExportFormatOptions_reserved5' on type 'CrystalDecisions.ReportAppServer.ReportDefModel.EditableRTFExportFormatOptionsClass' from assembly 'CrystalDecisions.ReportAppServer.ReportDefModel, Version=11.0.3300.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' is overriding a method that has been overridden.

   at CrystalDecisions.ReportAppServer.ConvertDotNetToErom.DotNetExportOptionsToEromExportOptions(ExportOptions exportOptions)

   at CrystalDecisions.ReportSource.EromReportSourceBase.ExportToStream(ExportRequestContext reqContext)

   at CrystalDecisions.CrystalReports.Engine.FormatEngine.ExportToStream(ExportRequestContext reqContext)

   at CrystalDecisions.CrystalReports.Engine.FormatEngine.Export(ExportRequestContext reqContext)

   at CrystalDecisions.CrystalReports.Engine.ReportDocument.ExportToDisk(ExportFormatType formatType, String fileName)

   at Crystal_to_PDF.Program.Main(String[] args) in \\zrh-s107\usersb$\vbfaw\daten\visual studio 2010\Projects\Crystal\Crystal_to_PDF\Program.cs:line 41

Any ideas what might be the problem?

regards

lukas