I'm pretty savvy on computer and embroidery stuff, but lately I've been getting an error about improper argument. It happens when attempting to export the DST file. I can save the image file of the file I've just digitized, but it won't let me save the file to upload to the machine. 

I did a Google search, but found no hits, so if anyone has suggestions, I'm all ears. Thanks. 

It is not very commonly used software for creating machine embroidery designs. If it's a genially purchased software, you'd be better off contacting tech support or a dealer. This will solve your problems faster.