Index: trunk/core/kernel/utility/unit_config_reader.php
===================================================================
diff -u -r4802 -r4845
--- trunk/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 4802)
+++ trunk/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 4845)
@@ -443,7 +443,7 @@
 	function loadConfig($prefix)
 	{
 		if (!isset($this->prefixFiles[$prefix])) {
-			$this->Application->Debugger->appendTrace();
+			if ($this->Application->isDebugMode()) $this->Application->Debugger->appendTrace();
 			trigger_error('Configuration file for prefix <b>'.$prefix.'</b> is unknown', E_USER_ERROR);
 			return ;
 		}
@@ -512,9 +512,15 @@
 	function setUnitOption($prefix, $name, $value)
 	{
 		if (preg_match('/(.*)\.(.*)/', $prefix, $rets)) {
+			if (!isset($this->configData[$rets[1]])) {
+				$this->loadConfig($rets[1]);
+			}
 			$this->configData[$rets[1]][$name][$rets[2]] = $value;
 		}
 		else {
+			if (!isset($this->configData[$prefix])) {
+				$this->loadConfig($prefix);
+			}
 			$this->configData[$prefix][$name] = $value;
 		}