Lines 402-409 can be commented out in index.php, as they duplicate the query to list names of active instruments, and risk slow response if there are many active surveys (since this is called in a loop). The lines are:

$result2 = db_execute_assoc("Select surveyls_title from ".db_table_name('surveys_languagesettings')." where surveyls_survey_id={$rows['sid']} and surveyls_language='$baselang'");
if ($result2->RecordCount())
{
$languagedetails=$result2->FetchRow();
$rows['surveyls_title']=$languagedetails['surveyls_title'];
}