Arkadaşlar, neden cıkar bu hata uyarısı. Bilgisi olan var mı?

Warning: session_start(): open(/tmp/sess_eb47c12399f64db9880bd3c5e8a9f7eb, O_RDWR) failed: No such file or directory (2) in /home/ulkeler/public_html/theader.php on line 2

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/ulkeler/public_html/theader.php:2) in /home/ulkeler/public_html/theader.php on line 2

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/ulkeler/public_html/theader.php:2) in /home/ulkeler/public_html/theader.php on line 2

Warning: Unknown(): open(/tmp/sess_eb47c12399f64db9880bd3c5e8a9f7eb, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

İşin garibi bazen cıkıp, bazen kayboluyor. Nerdeyse databaseyle ilgisi var diyecem, yok değil. Bir aydır yoktu. Hic bir değişiklik yok dosyalarda.

Hic başınıza geldi mi?