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'davcio' is the routine that performs most of the I/O operations (read
from disk and write to disk) in pw.x ; 'error in davcio 'means a
failure of an I/O operation.
- If the error is reproducible and happens at the beginning of a
calculation: check if you have read/write permission to the scratch
directory specified in variable 'outdir'. Also: check if there is
enough free space available on the disk you are writing to, and
check your disk quota (if any)
- If the error is irreproducible: your might have flaky disks; if
you are writing via the network using nfs (which you shouldn't do
anyway), your network connection might be not so stable, or your nfs
implementation is unable to work under heavy load
- if it happens while restarting from a previous calculation: you
might be restarting from the wrong place, or from wrong data, or
the files might be corrupted.
Paolo Giannozzi
2010-04-08