>      I was wondering if there was a listing of the 
> different types of errors and warnings that frequently 
> come up while using HTTrack.

Err, no..

>      Currently I'm trying to figure out what to do with 
> a "warning link # 14 empty". And everything stops after 
> that error.  I am open to any ideas. Thanks in advance!

It's not an error - but a warning issued when the parser 
expected to have one more link, but couldn't find it. It 
happends with files being downloaded in background.

I will probably disable this warning in the near future.