Need Help Corel 2017

I have Corel 2017 and RD Works CAD..,...Yesterday they played well together. Today....not at all. I save a file in Corel, and save it again as an DXF file and RD Works says it doesn't exist Spent several hours trying various work arounds without success. I'm about ready to delete BOTH programs and reload. Has anyone else run into a similar problem?

 

Not a particularly small file. Of course the plot thickens Yesterday evening I tried again and everything was going fine until.........I turned the laser on one last time and nothing happened. There's power to the machine, I only found one circuit breaker inside so now I have a call in to tech support. Hopefully it's something simple and thanks for the reply!