I was using q3map2 - Q3Map (ydnar) - v2.5.7 (also v2.5.6) and it would crash during ‘— MapRawLightmap —’
I tried a bunch of different settings and it always crashed. (at …4…5)
I figured out the problem was that I had my map in
\et_map.folder\etmain\maps… (notice the ‘.’)
I renamed it to
‘\et_map\etmain\maps…’ (no period) and it worked. o.O
This isn’t really a question, just a remark not to use ‘.’ in your folder name. 
I didn’t think it would cause a problem but it did.