MapExport in VB.net - FatalExecutionEngineError

[pcardinal]

My code is

Imports Autodesk.AutoCAD.Interop

Imports Autodesk.AutoCAD.Interop.Common

Dim oAcad As AcadApplication = Application.AcadApplication

oAcad.ActiveDocument.SendCommand("-mapexport" & vbCr & "FDO_SDF" & vbCr & "test.sdf" & vbCr & "_N" & "_P" & vbCr)

the result is

FatalExecutionEngineError

The runtime has encountered a fatal error. The address of the error was at 0xe1b6d735, on thread 0x1018. The error code is 0xc0000005. This error may be a bug in the CLR or in the unsafe or non-verifiable portions of user code. Common sources of this bug include user marshaling errors for COM-interop or PInvoke, which may corrupt the stack.

Platform

   Civil 2013

   Windos 7 64

   VS2010

The "-map2sdf" does not create problems but "-mapexport" does. I am trying to create a sdf3 file. Any help would be realy appreciate.

[BrianHailey]

Might want to post your question HERE instead.