Can't get a filled triangle to print correctly.

I'm using a solid fill with a triangle. It displays correctly on the screen but just the border is printed. Yes, the fill is set to white. I can't find any way to set it to black. The print profile is monochrome. A dense hash was suggested as a solution to printing to PDF but I'm not sure that's a good way to go. I'm trying to use DS to create symbol graphics for SolidWorks Electrical. Our SolidWorks vendor recommended DS.