Sure - but first I'll psedocode it because even as a small testbed it is
somewhat complex

C++ DLL interface exposes invokeCrystal

               invokeCrystal is in a C++ compilation unit - pure C++

                                 ManagedReport *mr  =  new ManagedReport();

                                  mr->ViewReport();

                                 delete mr;

ManagedReport object is defined in a separate compilation unit compiled with
/clr

                                ViewReport()
                             {
                                ManagedCrystalObject ^mo = gcnew
ManagedCrystalObject
                             }

In the C# class ManagedCrystalObject a Winform hosting the Crystal Viewer is
to be displayed.

In the invocation of ViewReport I get the exception :  EEFileLoadException
Also to note is that I cannot step into the managed code unit from the
unmanged code unit.

If you still need the code I will upload it.

Thanks for your responses