Are you using ugxmod?
Did your map compile before?

 Yes
yes

[code=cs]Error: Could not load fx "treadfx/heli_dust_default".
Error: Could not load fx "treadfx/heli_water".
Error: Could not load fx "smoke/smoke_trail_white_heli".
Error: Could not load fx "smoke/smoke_trail_black_heli".
Error: Could not...