Hi All, I am trying to use this function so I can send some data to Excel, (vlax-import-type-library :tlb-filename "c:\Program Files\Microsoft Office\Office\excel9.olb" :methods-prefix "excm-" :properties-prefix "excp-" :constants-prefix "excc-" ) but I get this message User warning: assignment to protected symbol: excm-Acos and it asks me within a dialog box if I want to go into a loop which if I do I never get out of it. Can anyone help me here? Thanks heaps, Nabil. (sorry I sent this message by mistake to autodesk.autocad.2004)