Missing Part of Model when Sliced in Cura

[Macattack124 0]

When I scale my model to 200% I am missing part of the model in Cura. When I slice the model at 100%, it is able to slice it perfectly. I will attach pictures and stl file of the model. 

Arm_02.STL

[GregValiant 1,318]

This is in the Cura X-Ray view and your model is on the right.  The red area is an error in the model.  Go to the Cura Marketplace and load the Mesh Tools Plugin.  It runs a check on models when you open them and would have told you that the model has problems.  The model on the left was repaired in MS 3D Builder.

I had to rotate the model on the Cura build plate to get it to slice.  That's a known bug in 5.2.1.  But repaired model sliced at 200% and 300% as well.