> The program stops with a program error at 160 Meg. It 
> offers the close program dialog and shuts HTTrack down.

Did you try to do a "Continue an interrupted mirror" to 
quickly rescan the structure, and continue the mirror? Is 
it still crashing? If yes, please mail me 
(roche@httrack.com) the problematic URL

Ah yes, ensure that you are using the latest (3.20RC7) 
release, as many fixes were merged!