error: fopen write mode

error: fopen write mode

I made a model in gmax. When I try to export it as a mdx (with mdx importer/exporter) I get the message: "Runtime error: Feature not avalaible: "fopen write mode". What is wrong?

If I remember correctly, the exporter doesn't export

You need to print to listener and copy and paste all the information into a .mdl file (Text file saved as .mdl)

Just a question for you: You edited the vertices of that model??
If you edited them go to modifier list-> vertex and scroll down until you find Remove isolated vertices and clikc on it.Do the same thing with all the meshes that you modify and remove isolated vertices.
Thats should work