First, a grateful thank you for all of the suggested solutions. I sincerely appreciate the responsiveness and detail! Fantastic!
The original error was the standard “An Unexpected Error”, with GF support providing the additional guidance.
The objective of the architectural elevation was either to score or engrave, depending on which provided the quickest and cleanest results, as well as cut the major openings (doors/windows). My default programs are CAD and BIM software packages, and as @jbmanning5 and @rbtdanforth have suggested, a raster may be the most efficient solution if I can determine how to quickly include the cut openings. It might take longer, but it would be machine time.
That said, the score option suggested by @jbmanning5 produces good results. The draft setting is all that’s required at this scale, as the lines are very close together, providing a fairly dark field of line work (a raster may be able to provide even lighter lines). The issue with this method is the labor for prep on the front end. The hatch patterns in the example SVG were generated by Revit, exported to AutoCAD (.dwg), imported to Illustrator, and finally object>compound path>make. There are always extra lines/objects to clean up at each step of the process.
Because i can hide foreground objects as I wish in Revit, for an architectural model, all i’d need to do is plot to PDF, do the post in Photoshop and upload to GF. It sounds so simple… so this is where i go next…
Thanks to all, I’ll keep you posted