I was able to confirm it is definitely a QTR problem and not a problem with PrintTool by printing the same problem image outside of QTR just fine. The reason I mention the qtr update to 64-bit is the monthly Mojave warnings about the need to “contact the developer” when the underlying printing functions are called or when opening curves in curve view. —Richard Boutwell
Message
Re: [QuadtoneRIP] "Filter Failed" error with macOS Mojave
2019-06-29 by richard@...