Abnormal things in elastic constants calculation using COMB

Hi Hai-Ning,

I remembered I send you my input and output files that successfully
generated Hf elastic constants for a 5x5x5 Hf with COMB on one CPU. Have
you tried running with *only* the files I sent on just one cpu? The
potential file ffield.comb in /potentials is the one I used.

Ray