I am pretty sure I have tracked down this one and fixed it. Do you have a specific example that I can use to test my soluition? From: "MikkelFJ" <mikkelj-anti-spam / post1.dknet.dk> > But then I get method not found errors when working with ole automation > (i.e. script friendly) COM interfaces when there is an optional property in > the interface. > > Now I could understand it, if it worked consistently - but on one machine, > it fails if all arguments are optional, on another machine it fails earlier > on a method that has an optional property which is not the first argument.