I was doing a simple 5 box gradient patch. Drew it in Inkscape, then exported as PNG, attached.
It configured it with two copies of the attached file (and have not tried scaling it down to many fewer pixels), one at a medium speed and one at a very low speed. The low speed one seems to push it over the edge into failure. Will test again in a moment.
The GF front end fails to prepare this file. Times out.
That seems surprising.
Vector & Rastered SVG.zip (2.9 KB)