Hi Felix, On Fri, Jan 28, 2011 at 2:51 PM, Felix Messmer wrote: > Hi John, > > thanks for your reply! > Our *.stl files are already in binary format. Make sure that your binary .stl files do not start with the word "solid", because that would get interpreted as an ascii STL file, according to the spec. I think the cturtle versions used to handle this ok, but not the new versions. If this is the case, simply overwriting the word "solid" with a hex editor into anything else should fix the issue. Hope this helps, Mrinal