Hi,
In PHP 8.1 comparisons have changed if one of them is not a number.
Replace this function in frontaccounting/includes/db/audit_trail_db.inc:
function is_closed_trans($type, $trans_no) {
$gl_seq = get_journal_number($type, $trans_no);
if (is_numeric( $gl_seq )) {
return $gl_seq > 0;
}
else {
return false;
}
}