Thanks for your interest in our product. iGrid ActiveX is a product developed in VB6, and its source code is also VB6. As we understand, your ActiveX container is a C++ thing, and thus the iGrid source code will not help you in debugging. Even if you demonstrate the crash via a remote desktop app, it won't help because this C++ and VB6 construction cannot be debugged.
iGrid is oriented on usage in VB6-runtime-based COM environments, i.e. in VB6 exe apps and Microsoft Office VBA UserForms. Most likely, the ActiveX container you are using doesn't support a technology needed for VB/COM ActiveX controls or has a compatibility problem. And we think we can't change this, so that you are 'limited' by usage iGrid ActiveX in VBA applications.