Dear professors.
I am now trying to use "pair_style lj/cut/coul/long/tip4p" command, while an error occurs: "Invalid pair style (../force.cpp:175)".
I found that someone used this command, and I have checked the manual, but I did not find this command. I am wondering how this happens.
Best wishes,
Xiaohui She
University of Wisconsin-Madison
Dear professors.
I am now trying to use "pair_style lj/cut/coul/long/tip4p" command, while an error occurs: "Invalid pair style (../force.cpp:175)".
I found that someone used this command, and I have checked the manual, but I did not find this command. I am wondering how this happens.
it happens, for example, when styles are renamed to offer a more
consistent naming scheme.
the example you saw was likely written a long time ago or tested with
an old version of LAMMPS.
changes like this are discussed on this page
and the similar logs for the past 10 years that are referenced at the
beginning of that page.
have you checked the available pair styles for something similar?
a little common sense can be a wonderful thing. 
axel.