I've been using S3D for about 2 months with my Monoprice Mini Select without a problem. Last week my Prusa i3 Mk2 arrived. I put it to work right away printing around the clock for about 5 days without an issue. Then I had a strange problem with one part where the extruder stopped after about the 10% point. After that the printer was just going through the motions.
At first I thought it was a nozzle clog. So I cleaned it up and tried the part again. And, again, at about the 10% point the extruder stopped. I then tried a different but similar part to print. And, again, at about the 10% point the extruder stopped. I then selected a completely different part from a different vendor. It printed just fine. I then when back and selected a part that was also similar but different than the two problematic parts. And, yes, the extruder stopped. I went back to my MP Mini to print the first two problem parts. And they printed without a problem. At this point I used Cura 2.4 to slice the problem parts for the Prusa. And viola! They printed.
So, what the heck is going on? I don't tweak my slicing setting. About the only thing I ever change is the layer height and infill. And I doubt it is the STL vendor. They also print their models on an i3.
Here is a really terrible photo of the failed parts. As you can see the extruder stopped just after finishing the floor board areas.
The curved parts are balconies from an observatory model by Printable Scenery. And the big rectangular-ish part is a Merchant building also by PS.
http://www.printablescenery.com/product ... servatory/