"No, no, no, no, NO! NEVER use the 'Open' value when dealing with XL add-ins, and you should certainly avoid hard-coded Office versions in script. Use XL's Automation to add and remove its add-ins. Search *this* forum for 'Excel' and 'add-in' and you'll find examples. Or, if all else fails, there's a search thingy called 'Google' which is proving quiote popular these days. "