[Typo3] DB check, warning class.t3lib_db.php

[Eric Vlemmings]

Hi,

If I to DB check in my typo3 3.8 and then choose for Record Statistics I get 
the following 2 errors:

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result 
resource in /home/realdata/public_html/typo3/t3lib/class.t3lib_db.php on 
line 741

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result 
resource in /home/realdata/public_html/typo3/t3lib/class.t3lib_db.php on 
line 741

What can I do to fix this? Can I look somewhere, or read logs? which explain 
me more why this happens?

thanks in advance,
Eric