When ripping a PS file or a PDF file, the rip task errors out for certain files using Spot colours.
The following error appears in the rip: " - Exception in LibScreenParams: SInf Spot colour lookup failed".
File uses (Pantone) Spot colours.
The above screenshots show the original rasterize/assemble separations on the left, and the solution on the right. Remove all Spot colours from the list and click plus sign to add three or four new entries. Do not modify the name.