query was empty a error 256

Technical information

Error type 256

Error description Query was empty

URL www.bedandbreakfastregistry.com/php/clients_search.php?

Error file /home/bedandb1/public_html/php/include/dbconnection.php

Error line 26

SQL query
The above is the error message I am getting. I don't understand why phprunner did this. I will put the code below. Please help me.

I am putting a part of the code and the error is on line 26.

I put line 26 in red.
{

global $host,$user,$pwd,$errstr,$sys_dbname,$port;

$strhost=$host;

if($port && $port!=3306)

$strhost=$strhost.":".$port;

$conn = mysql_connect($strhost,$user,$pwd);

if (!$conn || !mysql_select_db($sys_dbname,$conn))

{

trigger_error(mysql_error(), E_USER_ERROR);

}

return $conn;

}
function db_close($conn)

{

return mysql_close($conn);

}
function db_query($qstring,$conn)

{

if(!($ret=mysql_query($qstring,$conn)))

{

trigger_error(mysql_error(), E_USER_ERROR);

}

return $ret;
}
function db_exec($qstring,$conn)

{

return db_query($qstring,$conn);

}
function db_pageseek($qhandle,$pagesize,$page)

{

db_dataseek($qhandle,($p