checkrelax

Prints the amount of relaxation each structure in */str_relax.out has
undergone, relative to */str.out (or */str_sup.out if it exists)
Typically, values above 0.1 are considered too much for the
cluster expansion to be applicable and the offending structures
should be disabled using the command:
 touch structure_number/error
where structure_number is the appropriate directory name.
The option -1 (the number 1) checks relaxations for one structure only in the current directory.

This command measures the magnitude of the strain that need to be applied
to the unit cell of str.cell to get the unit cell of str_relax.out,
neglecting (i) isotropic scaling and (ii) rigid rotation.
The numbers reported are the sqrt of the sum of each element of the strain tensor squared.