Angles in data file

Thank you for your reply.
I tried again. If I delete all angles in data file, it well wrong that
angle coefficient are not set. How can I deal with angle_coeff command when
there is no angles in data file?

​the number of angle_coeff parameters depends on the number of angle
*types*, but not the number of angles. you can have angle types defined but
not yet any angles.​

By the way, what is the right way to deal with a diatomic molecule's
angles setting in data and in file?

​i already told you, that his is utter nonsense. you cannot have an angle
in a diatomic.