Thanks Rafeeq, see below in BOLD.
I will try this and let you know the outcome.
########################################################################
# GUIPARMS
########################################################################
if (!$GUI_parm || (count($GUI_parm)==0)) {
$query = "select PARAMETER, VALUE from GUIPARMS with (NOLOCK) where PARAMETER in ('latest_av_defs', 'latest_ips_sigs', 'thcon_last_modified', 'thcon_level')";
$result = sav_query ($query, &$conn_id); ****** THis is line no 424 ******
while ($zeile = sav_fetch_array($result)) {
$GUI_parm[$zeile["PARAMETER"]] = $zeile["VALUE"];
}
//***********************************************************************************
// Reference Content Versions
$LatestDef = $GUI_parm["latest_av_defs"] ? $GUI_parm["latest_av_defs"] : gmt_date("Y-m-d", time())." rev. 001";
$LatestSig = $GUI_parm["latest_ips_sigs"] ? $GUI_parm["latest_ips_sigs"] : gmt_date("Y-m-d", time())." rev. 001";
$LatestDefDateOnly = substr($LatestDef, 0, 10)." 12:00:00";
$LatestSigDateOnly = substr($LatestSig, 0, 10)." 12:00:00";
//***********************************************************************************
// threatcon level
$gl_threatcon_last_modified = $GUI_parm["thcon_last_modified"];
$gl_threatcon_level = $GUI_parm["thcon_level"];
}