**Dear All,**

**I am minimizing the energy of a nanowire using minimize “command”.**

**I ran simulations in Linux machine and Mac. I am getting different force and energy values at the end of the run. The stopping criterion is also different for the two machines**

**here are the different results**

**In both machines, I used the same tolerance values**

**minimize 1e-14 1e-16 10000000000 10000000000000000**

Linux

Minimization stats:

Stopping criterion = linesearch alpha is zero

Energy initial, next-to-last, final =

-48779.708133 -49541.5982041 -49541.5982041

Force two-norm initial, final = 82.8119 0.00671866

Force max component initial, final = 1.61637 0.000683582

Final line search alpha, max atom move = 0.000244141 1.6689e-07

Iterations, force evaluations = 2195 4371

Mac

Minimization stats:

Stopping criterion = energy tolerance

Energy initial, next-to-last, final =

-48779.708133 -49544.6353335 -49544.6353335

Force two-norm initial, final = 82.8119 0.000229873

Force max component initial, final = 1.61637 7.12061e-05

Final line search alpha, max atom move = 1 7.12061e-05

Iterations, force evaluations = 5057 10113

**Moreover, If I use the below tolerance values**

**minimize 0 0 10000000000 10000000000000000**

Linux gives

Minimization stats:

Stopping criterion = linesearch alpha is zero

Energy initial, next-to-last, final =

-48779.708133 -49541.5982041 -49541.5982041

Force two-norm initial, final = 82.8119 0.00671866

Force max component initial, final = 1.61637 0.000683582

Final line search alpha, max atom move = 0.000244141 1.6689e-07

Iterations, force evaluations = 2195 4371

Mac

Minimization does not stop. probably it stops after reaching specified no. of iterations, which is very large in this case.

**Could anyone help me**

**Thanks**

**Sivashankar**