Problem with the help

[Collette Yann]

Hello,

When I try to open the help viewer (using the menu in the toolbar or via 
the console - help()), I've got the following error:

 !--error 241
File whatis.htm does not exist or read access denied.

at line      14 of function rescan_helps called by : 
line    16 of function sciGUIhelp called by : 
line    29 of function run_help called by : 
line    21 of function browsehelp called by : 
line    18 of function help called by : 
help();
while executing a callback
 
YC