WARNING: No fixes defined, atoms won't move


I was trying to minimize the potential energy of a system of atoms without changing the lattice constants (and also the box size). I used the following commands to perform the minimization.

min_style sd
minimize 0.0 1.0e-8 50000 50000

However, I got “WARNING: No fixes defined, atoms won’t move” in my output log file. I’m wondering what’s going wrong.

Thank you!

This warning will only appear if you are doing a “run” not a minimization with steepest descend.

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