Using Crystal Reports in a C# com library

Question

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

Answer 1

Daniel,
Thank you so much for your answer. It was very helpful. In the end, it didn't work but it helped me figure out what was happening. I use a different form for the reports and I had it coded in the form which report to use. I created a second form for the second crystal and then I used an if statement to choose the form and it worked like a charm.
Thanks so much again!