But what's the problem? That is, what problem are you experiencing? RepG issuing warning is normal. As to that warning, it looks like you are using RepG 40 - Sailfish when you are NOT using Sailfish. Don't do that. The warning you are seeing means that you have selected as your machine type --- Machine > Machine Type (driver) --- the machine "The Replicator Dual". Well, that's a non-Sailfish machine. Sailfish machines have "(Sailfish)" in the name. E.g., "The Replicator Dual (Sailfish)". Since you have a non-Sailfish machine selected and RepG 40 - Sailfish no longer includes machine definitions for non-Sailfish machines, you see that warning.