I am trying to register a dll developed in Visual C++ for use in a VB 6 app. The process gives me the following error: "Debug assertion failed" and specifies Viewhtml.cpp line 419 as the file where the assertion error fails. Is there an obvious reason why I'm gettin this error - maybe a required dll on my system (Windows NT 4 SP4). I infortunately do not have any knowledge of what is used to develop the dll in Visual C++! Hope somebody out there can help?