many people have recieved the ACCESS DENIED error
well the most common reason this happens, and the only way it happened to me was because
i did something stupid

you should get this error if you had more than one map open in HAMMER and then closed HAMMER
i don't know why it happens it just does
so now if attempted to be compiled
the map will say access is denied
to fix this is just to re-download hammer and zoner's hl tools
so DON'T CLOSE HAMMER WITH MORE THAN 1 MAP OPEN
if redownloaded and put in the same folder, all the hammer settings should be the same as before