Parameter is incorrect

We have searched this forum and found a smiliar thread address our problem, but have not had any luck fixing it and are hoping someone can provide us with additional information...

My co-worker is using RoboHelp 6 to create a project and, when she tries to delete a topic, a window appears telling her that the parameter is incorrect. Four of us are using the package, and she is the only one experiencing this problem. Does anyone have any idea why this is happening?

We attempted to delete the file from Windows explorer, but when we opened RoboHelp 6 HTML, the file is marked for deletion (red X). We attempted to try the reengineer process, but we were unsure about how to proceed.

I copied the project to my system, and sure enough - I could not delete these files either (even though I tested to ensure I could delete files from other projects that I had created).

I then created a new project and imported the wanted files into the new project and passed the project back to her to continue with development.

It is not an isolated incident with her - she has a couple of other projects where this is happening...

Any advice on why it is happening and how to avoid it in the future?

Thanks in advance.

Lisa