Ran into slice error issue in WIn 7 with 3.6.2. Using a Taz 6 with Dual v3 extruder during smoke test.
The first time I installed software and added this printer/extruder configuration, I got a slice error on the pre-loaded file. Error message: unable to slice due to some per-model settings. The following settings have errors on one or more models: Support Infill Layer Thickness
When I checked the Infill Lyer Thickness it was set to 0.34 mm.
Then i changed the file to 3DBenchy file and got the same result. I noticed that the print quality was set to High Detail on extruder 2 while extruder 1 was set to standard. Changing the quality on one of the extruders to match the other will allow the slice to occur.
I uninstalled, cleared cache and re-installed a few times and was not able to replicate from initial launch again. However, if I leave one extruder at standard quality and change the other extruder to High Quality, I get a slice fail error. This does not occur if I leave one at standard and change the other to high speed.