user-mapped section open

I just started getting this error message recently. Running Vista Home
Premium. This morning, I selected about 2GB of files to copy from one
Explorer window open on my local hard drive and dragged them to another
Explorer window which was open on an external hard drive. I started getting
this error message on several files. After just clicking on OK each time, I
closed the source explorer and then everything copied with no more error
messages.
>
> "Bruce" wrote:
>
> > I am running Vista Ultimate (with a clean install rather than upgrade.)
> >
> > Quite often, when I use Windows Explorer to copy a group of files to a
> > different folder, I get a dialog box with this error message....
> >
> > Error 0x800704C8: The requested operation cannot be performed on a file with
> > a user-mapped
> > section open"
> >
> > The good news is that I can simply hit the "try again" button and it copies
> > fine. The bad news is that the same dialog box pops up repeatedly for many
> > if not all of the files that I am copying. Gets very old, very fast.
> >
> > The error message means nothing to me. My Google searches of newsgroups has
> > yielded little, other than a set of other people frustrated with similar
> > challenges.
> >
> > Can someone explain the problem and propose a solution?
> >
> > thanks, Bruce
> >