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Dear all,

The compute I am using is a server with two quad core CPUs and the OS is ubuntu server. VASP version 4.6 and 5.2.

There is no problem when I run small calculations(half day work). When I try to run a large (2x2x1) supercell (16 atoms in total) with a 8x8x10 or larger kpoint mesh, it works at the beginning and give reasonable reults, but it stops in the middle. The error message is "orrtl: No such file or directory forrtl: severe (29): file not found, unit 8 ".

I don't understand why it suddenly can't find the OUTCAR file after it wrote it for quite some times.

Very frustrating, can anyone help me out? Thank you very much.

Cougarnie
---- a sample log------

POSCAR, INCAR and KPOINTS ok, starting setup
WARNING: wrap around errors must be expected
FFT: planning ... 7
reading WAVECAR
WARNING: random wavefunctions but no delay for mixing, default for NELMDL
entering main loop
N E dE d eps ncg rms rms(c)
DAV: 1 0.101013064782E+04 0.10101E+04 -0.42547E+04 16320 0.105E+03
DAV: 2
........

DAV: 15 -0.101321414951E+03 0.56487E-03 -0.29410E-03 22736 0.533E-01 0.241E-01
forrtl: No such file or directory
forrtl: severe (29): file not found, unit 8, file /home/cougar/OUTCAR
Image PC Routine Line Source
vasp-serial 000000000077397D Unknown Unknown Unknown
vasp-serial 0000000000772485 Unknown Unknown Unknown

Did you delete it by accident?

No. The file is still there. This problem happens all the time when I run a relative large calculation.

Hi there! I am also encountering the same problem. I am calculating using a cluster and my system is quite big. It runs a few electronic steps then stop because of this error:
forrtl: No such file or directory
forrtl: severe (29): file not found, unit 8, file /home03s/elvis/CO-lit-Pbterm-bridge/pbterm-bridge-d5.0/OUTCAR
Image PC Routine Line Source
vasp.5.2.11 00000000013D6B51 Unknown Unknown Unknown
vasp.5.2.11 00000000013D5B25 Unknown Unknown Unknown
vasp.5.2.11 000000000136E97A Unknown Unknown Unknown
vasp.5.2.11 000000000131FFF2 Unknown Unknown Unknown
vasp.5.2.11 000000000131F821 Unknown Unknown Unknown
vasp.5.2.11 0000000001330F30 Unknown Unknown Unknown
vasp.5.2.11 0000000000B6DD94 Unknown Unknown Unknown
vasp.5.2.11 0000000000954037 Unknown Unknown Unknown
vasp.5.2.11 000000000042DF2B Unknown Unknown Unknown
vasp.5.2.11 0000000000410D9C Unknown Unknown Unknown
libc.so.6 0000003DD3E1D994 Unknown Unknown Unknown
vsp.5.2.11 00000000013D6B51 Unknown Unknown Unknown

Please help!

thanks