--- a/msitegen.inc.php	Sun Nov 17 19:26:46 2013 +0200
+++ b/msitegen.inc.php	Sun Nov 17 20:04:50 2013 +0200
@@ -8,6 +8,8 @@
 // Globals and definitions
 $errorSet = FALSE;
 $errorMsg = "";
+$statusSet = 0;
+$statusMsg = "";
 
 // Value types
 define("VT_STR", 1);
@@ -38,6 +40,14 @@
 }
 
 
+function stSetStatus($status, $msg)
+{
+  global $statusSet, $statusMsg;
+  $statusMsg = $msg;
+  $statusSet = $status;
+}
+
+
 function stCheckHTTPS()
 {
   return isset($_SERVER["HTTPS"]) && ($_SERVER["HTTPS"] != "" && $_SERVER["HTTPS"] != "off");
@@ -249,7 +259,7 @@
 function stChkRequestItem($name, &$sdata)
 {
   if (!isset($_REQUEST[$name]))
-    return FALSE;
+    return stErrorStrF("Required data item '".$name."' not set.", $name);
 
   $data = trim($_REQUEST[$name]);
   $slen = strlen($data);
@@ -482,28 +492,17 @@
 }
 
 
-function stSetStatus($val, $msg)
-{
-  global $statusSet;
-  if (!$statusSet)
-  {
-    header("Status: ".$val." ".$msg);
-  }
-  $statusSet = TRUE;
-}
-
-
-function stExecSQLCond($sql, $okmsg)
+function stExecSQLCond($sql, $msg = FALSE)
 {
   if (($res = stExecSQL($sql)) !== FALSE)
   {
-    if ($okmsg != "")
-      stSetStatus(200, $okmsg);
+    if ($msg !== FALSE)
+      stSetStatus(200, $msg);
     return $res;
   }
   else
   {
-    stSetStatus(900, "Error in SQL execution.");
+    stSetStatus(902, "Error in SQL execution.");
     return FALSE;
   }
 }