Fatal Error: Unexpected error from Microsoft HTML Compiler

Question

I'm using RH 6 with Vista (yes I know Vista is not supported,
but I'm one of the few that has to have it, so I'm using the
tweaked unsupported version)
Sometimes when generating a CHM output (Compiled HTML Help)
right after the "Compacting file system..." step I get an error
that says "Fatal Error: Unexpected error from Microsoft HTML
Compiler".
I'm not sure what causes it. I don't get it all the time, but
I seem to get it more often than not. However, it doesn't seem to
do anything adverse to the compiled help file. Well, not that I can
see anyway.
Any information on what causes this and how I can fix it?

Answer 1

If deletion of the CPD doesn't work, there seems to be more
amiss in the HHP.
Have you had a look at the new version of the HHP-file?
Your missing images are due to another problem: I guess you
have images linked to from imported topics. During import RH copies
all necessary files to the appropriate relative locations, but it
does not 'recognize' new folders created during this step. For the
compilation RH copies all the stuff it thinks belong to the project
to a temp folder, but 'unrecognized' files are ignored, thus
missing in the compiled help.
Use Windows explorer to note where linked images are situated
and 'create' these folders within RH via the context menu of the
Project Explorer's folders 'HTML Files' section. This way RH
suddenly recognizes the folders and is able to handle the images
therein.
Perhaps some unrecognized folders are responsible for
compiler crash, too?
Regards
---Dirk Bock