seti@home --- error

["Amit Goel" <agoel@xxxxxxxxxxxxx>]

  hi

i had run setiathome on rhlinux 6.2 and it was tunning fine. but after 3
days I observed that it was not running in background so i tried to execute
it and got following error :
**********************
Found data file: no. Found result header file: no.
Getting data - connecting to server.
Can't write to file - disk full?
*********************

disk quota not enabled and df shows 88% used disk



What could be the reason for error ?

amit