lh

I’ve got a machine here with a batch file that issuse commands like

LH c:\net\umb.com

It crashes and gives messages saying thay lh is not recognised as a proper internal or external command.
I thought lh was a valid dos command for loading things into higher memory.

I’m running xp. Are there any settings or anything that could have been changed that would stop the machine recognising the lh command?

Phil