Images missing in Web Help

Hi Everybody
I've recently experienced a problem with a RoboHELP project
where the graphics are not displaying in web help output despite
having been properly linked into the topics. This occurred
unprompted with no action on my part.
Subsequent investigation showed that the image files missing
from the web help output were no longer showing in the RH project
view under Images. They were still present on the C: drive if
viewed using windows explorer.
Once one of the missing image files is linked back in using
RH, other missing image files appear back in the project view.
This problems seems to occur after:
1. Newtwork problems had occured
2. When the output was web help
Most curious though, is that the RH project and the compiled
output were all stored on my local hard drive i.e NOT over a
network drive.
I used a folder under my documents to store the RH project
and the compiled output. The compiled output was also run from the
local hard drive not the network. We are running IE7 but I have
observed similar problems under IE6.
What do people suggest:
1. Might prevent this in future?
2. Has anyone out there experienced similar problems?
So far I have simplified the project structure using no
folders to dvide up the project but not sub folders. I am also
trying out running from C:\directory etc rahter than under "MY
Documents"
Please can anyone help?

Update on the situation..
By happy coincidence my RH crashed this afternoon whilst I
had help "project x" open!
This meant I could test a few things out. when Project x was
compiled into web help, surprise suprise, missing graphics again.
I then closed RH down and made safe copy of the CPD file for
project x. I removed the CPD file from the project x directory.
Following this I opened project x in RH again. I then compiled and
all graphics had returned.
In other words the cause of the problem was shown pretty
conclusively to be the CPD file being corrupted by an event whilst
that praticular project was opened. As an additional test, I opened
and compiled some other web help projects that were not open at the
time of the crash and these came out fine with no missing graphics.
Anyway thanks very much again for the advice.
For anyone else reading this I feel that using merged
projects on a large help system might be a good way to limit damage
to a large help system. That way one is only working on one segment
at a time and if an event occurs the damage is limited to what was
open at that time.

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I finally had time to play - unfortunately it does
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