Good morning. I have write a code to open a part, save asiges andclose. this code work well: ... Set swModel=swApp.OpenDoc6("xx.SLDPRT", 1, 0, "", errors,warnings) partTitle2= swModel.GetTitle Set swModel =swApp.ActivateDoc2(partTitle2,False, errors) swModel.EditRebuild3swModel.SaveAs2 "xx.IGS", 0,True, False swApp.CloseDoc"x.SLDPRT" ... but my purpose is executethis operation ibackground mode so the user can't see thisoperation. Is there theway to do this?? thanks.SolidworksApi macros