Error: non positive-definite matrix in potrf,

Hassan Aghababaeian <[email protected]>
Newsgroups gmane.comp.science.photonic-bands
Message-ID <[email protected]>
Dear Mr. Johnson and MPB Users

I tried a Loop to increase line defect of PCW, and study its effect of dispersion curve.
But facing Error:
CHECK failure on line 243 of ../../../../src/matrices/blasglue.c: non positive-definite matrix in potrf
then 
solve_kpoint(0.219355,0,0):
Solving for bands 1 to 6...
and MPB Broken and will not continue any Iteration.

the location of error is random, I mean some times in 5th titration and some time in other iteration this problem happened.
I searched on the forum, but unfortunately I Couldn't understand solution for this error.

I have to mention when I run examples or .Ctl file with few number of iteration, I will not face such a problem

Any Help!

Regards
Hassan

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