We added a help file into our application. In my main.prg I place an:

SET HELP TO "myhelpfile.chm"
ON KEY LABEL f1 HELP

On half the PCs that we test this on, the help file comes up.
On the other half of the PCs that this is tested on, nothing comes up.

What could cause this?

I am using VFP6 SP4. The application runs on all types of PCs. We do not distribute the help engine, however, on the PCs that the help does not work on, if you double click on the .CHM file from explorer, the .CHM does display correctly.

Why would the .CHM work on only some PCs? When the help doesn't work, there is not an error message.

Thanks,

Jerryt