Miguel,
After using Windows 2000 for some time, the "Related
Topics" link in Windows Help pages began showing the
following message:
"This operation can only function within HTNL Help"
instead of showing the usual list of related topics.
Have you installed Service Pack 4 for Windows 2000 yet? If you
haven't, applying Microsoft Critical Update 811630 should fix this
problem. You can download the update from:
http://support.microsoft.com/?kbid=811630
If you *have* installed Service Pack 4, the solution may be to open a
command prompt window and then run these two commands:
regsvr32 /u <drive>:/winnt/system32/hhctrl.ocx
regsvr32 <drive>:/winnt/system32/hhctrl.ocx
The first command unregisters the HTML Help ActiveX control, which is
what provides the navigation features in the help files; the second
command re-registers the control. This should fix the broken registry
entries that are probably responsible for the problem.
If neither of these solutions works, here are a fairly standard set of
troubleshooting exercises to try:
1) Use MJ's Help Diagnostics to check that the HTML Help runtime
components are properly installed and registered.
http://helpware.net/downloads/index.htm#MJs
2) Delete the file hh.dat, which you should find in this hidden
subdirectory:
\Documents and Settings\%username%\Application Data\Microsoft\HTML
Help
The hh.dat file is a database file that saves such session information
as the window position and favourites for the HTML Help viewer. If the
file has been corrupted then .chm files may behave erratically.
Windows will automatically re-create the file when you next open any
..chm file.
3) Empty the Temporary Internet Files (TIF) directory. A full TIF
directory can cause HTML Help files to misbehave.
