Hmm doesn't sound good. It sounds like IronCAD is just hanging when you attempt to import the file. It could be that IronCAD is looping on some geometry that it doesn't understand. Now I *really* want to see that file so that we can improve IronCAD to work with it

. We often sign non-disclosure agreements so that we can help with sensitive files such as yours so that's an option. If you want to fax one to me I'll have our executives sign it. (770-937-0700)
Try importing this .x_t file which is just a simple cube. It would be good to see if you can import ANY .x_t file. It may be your translator, it may be just the file.