My Community

my INCAR as follows:
SYSTEM=C-Au
GGA=PE
ENCUT=500
ISTART=0;ICHARG=2
ISMEAR=0
SIGMA=0.1
PREC=Accurate
ALGO="Fast"
LREAL= Auto
#NGX=38
#NGY=198
#NGZ=126

Then the error in OUTCAR as follows:
kinetic energy error for atom= 0.0076 (will be added to EATOM!!)
kinetic energy error for atom= 0.0042 (will be added to EATOM!!)

please tell me why?
thank you!

This is not an error at all...

It is the approximate error according to the RRKJ (Rappe, Rabe, Kaxiras and Joannopoulos) kinetic energy criterion.
You can get more info from the VASP Guide.

See the last several lines in "Pseudopotentials supplied with the VASP package" node.
http://cms.mpi.univie.ac.at/vasp/vasp/node223.html