Call to undefined method MDB2_Error::query()

[jojiju]

hello,
I am using MDB2 classs. I called the following in the constructor

function __construct() {
$this->_oConn =& MDB2::connect(DSN);

if (PEAR::isError($this->_oConn) ) {

catchExc($this->_oConn->getMessage());
}
}

function _screenNameExists($sScreenName) {

// check for matching screen name
$sql = "SELECT
account_id
FROM
".PREFIX."_accounts
WHERE
account_screenname='".$sScreenName."'
and deleted=0";


if (PEAR::isError($rsTmp = $this->_oConn->query($sql))) {

catchExc($rsTmp->getMessage());
return false;
}

// return matching number of rows
$return = $rsTmp->numRows();
return $return;
}

call to undefined method MDB@_Error::query() occurs please help.

[mark]

Are you sure that you're showing all important parts of your code here?

Although there is an error check in the constructor, there seems to be an issue with the connection. Please insert the block from the constructor also directly before the query() call: