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I have tried to use the below script for simulation of 31 atoms

SYSTEM = Si:
ISTART=0
ISYM=0
ICHARG=2
ISMEAR=0
SIGMA=0.1
LORBIT=11
NSW=200
IBRION=2
ISIF=3
EDIFF=0.0001
EDIFFG=-0.01
ALGO=Normal
IALGO=48
ADDGRID=TRUE

but the simulation after some iteration shows

Error EDDDAV: Call to ZHEGV failed. Returncode = 25 2 8

can anyone help with this problem

please can anyone provide me with any solution as i am still facing this problem.

Is this a slab or bulk material? If it is a slab, see if your total length in the C-axis is > 50A, if it is, you might want to reduce your vacuum length