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Why does my linear pattern feature switch directions, and can I make it stop?

Question asked by Dan Morick on May 16, 2018
Latest reply on May 16, 2018 by Tom Gagnon

I have an assembly made via skeletal modeling technique (one hidden part controls criteria for other parts).  In one of the parts I have a hole feature.  I pattern the hole feature in one direction across the part.  All is well.  Then when I rebuild, sometimes that pattern spontaneously switches to the opposite direction, and the assembly loses its mind.  I have to go back to that part, edit the feature to change the direction, and then rebuild everything again.  All is well until the same thing happens again later.

 

Does anyone have an explanation or solution for this?
I'm using SW 2013, but I'm not sure it's relevant in this case.

 

I've attached the model, detached from the skeleton that normally drives its parameters.

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