Are you using RoboServer? That's the only reason you would use the Pro versions of WebHelp or FlashHelp. Does the output launch if you generate locally? If so, then the problem's on your web server.
I don't think we are (my technology insights are very limited). We are a company on a very small budget.
Ordinarily everything has published fine, using the Pro version. Let me add that this was a project handed over to me, so I didn't actually set up all the parameters for publishing. All the settings seemed to work, so I didn't want to upset the apple cart, so to speak.
When I select WebHelp > right click and select View, everything looks just as it should. So yes, I agree it is a problem with the web server. Any thoughts on what I can tell our IT guys to look for?
What I don't understand is how a file that hasn't been touched in 8 months could one day be fine and the next day, display the message from my original post.
Any recommendations for IT would be greatly appreciated.