I checked the application set up for the file type as Anand suggested, and 
it is exactly as he said his is set up.


>> Also double clicking on the file produces a strange error message
>
>It is usually helpful to provide the error message.
>
>What does it say?

Yeah you are right. have now fired it up. If I double click on 
"hlpMPLABICD2.chm" in the "C:\Program Files\Microchip\MPLAB IDE\ICD2" 
directory, then I get a message that says "cannot open the 
file:mk@MSITStore:C:Program Files\Microchip\MPLAB 
IDE\ICD2\hlpMPLABICD2.chm". This is on the machine where the software is 
installed.

If I now access that same drive from another machine, across a network 
connection, the other machine opens the file, and shows the index folders in 
the left hand pane, but the right hand pane shows "The page cannot be 
displayed" for any and all pages I have tried. Both machines have identical 
file options settings for the *.chm file type.

I did a file search for CHM extensions, and all the files from multiple 
sources produce a matching error message on the system where MPLAB is 
installed. Accessing these same files from the other machine produces the 
same result as for the MPLAB help files (index but no content).

The second system can properly open CHM files on its own drives.




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