Warning session_start

Warning: session_start() [function.session-start]: open(/home/content/39/10051439/tmp/sess_gmjo9ai9p56qh5bviapn63b4k3, O_RDWR) failed: No such file or directory (2) in /home/content/39/10051439/html/inkeshaf/ur/wp-content/themes/photopress/functions.php on line 20.


i am getting this error.what is solution.

Warning: session_start() [function.session-start]: open(/home/content/39/10051439/tmp/sess_gmjo9ai9p56qh5bviapn63b4k3, O_RDWR) failed: No such file or directory (2) in /home/content/39/10051439/html/inkeshaf/ur/wp-content/themes/photopress/functions.php on line 20

Hi!
Please, contact your host provider to fix this. These warnings are caused by settings of php.