This error occurs if an
object is to small. E.g. if edges of an object (nearly) touch each other.
To solve that problem you should enlarge the object or if it's a
cylinder/cone, you should reduce the number of sides.
You should also check if you there isn't any dimension
value of an object that is set to zero (e.g. object length = 0 m or bottom
width of a cylinder = 0 m) 
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