https://forums.autodesk.com/t5/machining-discussions-forum/stock-simulation-error/m-p/6090658#M5294 So now checking other jobs, there appears to be the same error as well even in prismatic stock. In this job the error is in the Y axis. Attached is a screen shot showing the offset material. Thu, 03 Sep 2015 00:22:00 GMT Anonymous 2015-09-03T00:22:00Z