php err msg/issue...

hi... i'm dealing with an app that's throwing an err/warning msg.. i'm using php5, on a linux rh8.0 system. i believe the code was written for php4. the code is: if($rec) { $rs->append($setDefaults); $rs->rows[$rs->pos]->fields=$rec; <<<<<<generates err msg... $rs->rows[$rs->pos]->id=-1; } $rec = Array ( [0] => 0 [1] => admin [2] => 21232f297a57a5a743894a0e4a801fc3 [3] => [4] => TRUE ) the err msg being generated is: Php-Txt-Db-Access Error: PHP Error: [2048] Creating default object from empty value [Line: 1537] [File: /var/www/html/blast/txtdbapi/resultset.php] i'm not sure why this is generated, or what's going on, or even how/why to correct it!! apparently this doesn't happen with php4, but i'm not certain. any thoughts/opinions/comments would be helpful... thanks -bruce