Not sure if this is the right group to post this so sorry if it's not...

I've written a help file in HTML Help but when i compile it and then launch
the file i get a page not found message for the first page. When I then
click the page from the menu it is shown without problems.

Is there some naming convention for the first page (like on a web server)
- at the moment it's named introduction.htm

Many thanks for any help