Goodmorning, I'm Roberto and I write from Italy, a tou will excuse me for my bed english. I really like programming macro for SolidWorks for my job, and I preform a macro for define sketch automatically. The firs part of the macro, works properly, becouse it' works in a part's sketch condition. The second part instead, works in a part's sketch condition, but in the assembly. The problem is in the line lStatus = swModel.swSketchManager.FullyDefineSketch(True, True, swSketchFullyDefineRelationType_e.swSketchFullyDefineRelationType_Vertical Or swSketchFullyDefineRelationType_e.swSketchFullyDefineRelationType_Horizontal, True, 1, Nothing, 1, Nothing, 1, 1) but I don't understand where is the mistake. The Solidworks crash, after. Could someone help me, please?