Workaround:
Created another type of field, changed its volume shape to curve and connected the curves worldSpace0 attr to the inputCurve attribute of the field.
The applyPerVertex stays ghosted...
I tried to set it through MEL and didn't get any error messages. So I assume the attributes are set.
(also created some attrPP for the trapInside)
CODE
setAttr "airField2.applyPerVertex" 1;
setAttr "airField1.applyPerVertex" 1;
in the nParticles' RuntimeBeforeDynamics:
CODE
nParticleShape1.airField1_magnitude=5;
nParticleShape1.airField1_trapInside=1;
nParticleShape1.airField2_magnitude=0;
nParticleShape1.airField2_trapInside=0;
It does something, but not what is expected.
The particles should follow the curve assigned to airField1.