[Couenne] generate .nl file from AMPL

[David Gravot]

Hello,

I'm trying to test Couenne on a non-linear non-convex problem that comes
from an AMPL modeling, say  myampl.mod . Two naïve questions : 

1) What's the exact syntax to generate a .nl file from my myampl.mod ? I
tried unsuccessfully "write gmyampl", "write gmyampl.nl" 
2) Does a maximization objective in the original file need to be transformed
in a minimization one , or can Couenne read it directly in the nl file ?

Thanks

David Gravot
dgravot at noos.fr

ROSTUDEL Operations Research 
www.rostudel.com