How i can give self propel force to brownian particle to make active?

Hello to everyone…
I am a new user of LAMMPS. I want to make a calculation for active Brownian particles…

i am using lammps on the window…

when I used the “self/propel” command and give value to force it shows illegal dipole command… but lammps documentation has the same syntax that I used to like…

fix active all self/propel dipole 40

Please read the entire documentation for that command very carefully and the answer should reveal itself to you.

Thank you for your positive feedback…