Can anyone tell me how to write the “fix wall/harmonic” command
This is what I followed the instruction online and tried
“fix zwalls all wall/harmonic zlo 50.0 0.0 5.0 zhi 50.0 0.0 5.0 unit box”
But I always get the “illegal fix wall command” error
In my understanding the “zwalls” is the fix ID, “all” is the group ID, wall/harmonic is the fix style, “zlo” is the face, 50 is the epsilon value, 0.0 is the sigma (which is ignored according to the instruction), 5.0 is the cutoff distance. And at last I set up the unit the same as the box unit
Is there any mistake in my input?
Thank you very much