pair-force-compute

That's just an error. Someone probably copy/pasted to create the coulwolf
sytle and didn't see the setting. Coul/wolf provides a single method, so
just
delete single_enable = 0 from the constructor.

no, steve.

according to the commit history, this change was made explicitly on
january 30th 2014. pair style coul/wolf existed before. please see
this commit:

https://github.com/lammps/lammps/commit/1ba04dabf6c9230155bf893c356dae8ded366e7d#diff-6fdd5c6f91248c765621f72a8d7cf3d7

now, if only we had proper commit messages, then we would also
probably have an idea *why* this change was made... :wink:

axel.