Using Crystal Reports in a C# com library

Hi,

we use CR (with the old RDC activeX) for one of our native C++ applications. Since RDC is no longer supported we try to migrate to CR XI V4.

We've created a C# com library that hosts the report viewer control and call library functions via IDispatch methods.

When trying to load a report we get an C++ MalformedURLException

Testcode:

ReportDocument rd = new ReportDocument();

rd.Load(@"test.rpt"); // Throws exception

I was able to trace back this to a call into xerces-c_2_1_0.dll:

void XMLURL::parse(const XMLCh* const urlText)

{

    // Simplify things by checking for the psycho scenarios first

    if (!*urlText)

        ThrowXML(MalformedURLException, XMLExcepts::URL_NoProtocolPresent);

    //

    //  The first thing we will do is to check for a file name, so that

    //  we don't waste time thinking its a URL. If its in the form x:\

    //  or x:/ and x is an ASCII letter, then assume that's the deal.

    //

    if (((*urlText >= chLatin_A) && (*urlText <= chLatin_Z))

    ||  ((*urlText >= chLatin_a) && (*urlText <= chLatin_z)))

    {

        if (*(urlText + 1) == chColon)

        {

            if ((*(urlText + 2) == chForwardSlash)

            ||  (*(urlText + 2) == chBackSlash))

            {

                ThrowXML(MalformedURLException, XMLExcepts::URL_NoProtocolPresent);

            }

        }

    }

urlText points to "C:\Program Files (x86)\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\SAP BusinessObjects Enterprise XI 4.0\java\CRConfig.xml".This file doesn't exist and is invalid in above context.

The above sample works fine when using in a standard C# application.

Any ideas ?

Gunnar