UT theoretical chemistry code forum

For the NEB calculations of vacancy migration, the cell shape and volume for all images including initial and final ones should be fixed or not? Thanks.

Is it the same value as the line: "tangential force:" of the last iteration in the normal version VASP OUTCAR?

Yes, you are right. I simply use the normal vasp binary. Then how can I extract this force info from the normal NEB vasp OUTCAR? Thanks a lot!

After running the nebbarrier.pl script, the output neb.dat file shows all zero forces at the fourth column.
How can I solve this problem? Thanks a lot!