As below, I have a dialog box asking me for a filename.
It will then add the file extension onto the end.
answer = inputdlg(fileName,dlgtitle,dims,definput);
fileName1 = strcat(answer,'.dxf');
FID = dxf_open(fileName1);
I've tried numerous different ways, and they all end up with errors.
The code works normally if I hardcode the file name into the dxf_open function. e.g. 'Export.dxf'