After the removal of BHD3, the location of ERR.BAT (a batch file that gives test descriptions of DOS error codes) isn’t in the path.
To add it to the path:
Right-click on MY COMPUTER
Select ‘Properties’ from the pop-up menu.
For WinNT, select the Environment Tab.
For Win2000, select Advanced, and then click on Environment Variables.
Add F:PUBLICSEARCH tot he path.

For Win95/98 machines, it will have to be added to a path statement in AUTOEXEC.BAT