note 106486 added to function.mysql-num-rows

i have a problem using : mysql_connect($hostname, $username, '') or die ("Database CONNECT Error (line 18)"); mysql_select_db("ITC1"); $result = mysql_query("SELECT * FROM pauta where user=".$_SESSION['user']); if (mysql_num_rows($result)) { while ($qry = mysql_fetch_array($result)) { echo " <table border='1' width='100%' cellspacing='0' cellpadding='0'> <tr> <td width='16%'>$qryy[Nome]</td> <td width='8%'>$qry[Portugues]</td> <td width='9%'>$qry[RI]</td> <td width='9%'>$qry[Matematica]</td> <td width='7%'>$qry[SD]</td> <td width='8%'>$qry[Hardware]</td> <td width='3%'>$qry[LTP]</td> <td width='11%'>$qry[PP]</td> <td width='8%'>$qry[PH]</td> <td width='10%'>$qry[media]</td> <td width='10%'>$qry[falta]</td> </tr> </table> "; i have got this error : Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\33\Test.php on line 76 ---- Server IP: 69.147.83.197 Probable Submitter: 41.220.36.65 ---- Manual Page -- http://www.php.net/manual/en/function.mysql-num-rows.php Edit -- https://master.php.net/note/edit/106486 Del: integrated -- https://master.php.net/note/delete/106486/integrated Del: useless -- https://master.php.net/note/delete/106486/useless Del: bad code -- https://master.php.net/note/delete/106486/bad+code Del: spam -- https://master.php.net/note/delete/106486/spam Del: non-english -- https://master.php.net/note/delete/106486/non-english Del: in docs -- https://master.php.net/note/delete/106486/in+docs Del: other reasons-- https://master.php.net/note/delete/106486 Reject -- https://master.php.net/note/reject/106486 Search -- https://master.php.net/manage/user-notes.php