function getInternalID($stringID,$glueCharacter = null)
	{
		if (is_null($glueCharacter))
		{
			$cfg = config_get('testcase_cfg');
			$glueCharacter = $cfg->glue_character;
		}
		$internalID = 0;
		// Find the last glue char
		$gluePos = strrpos($stringID, $glueCharacter);
		if ($gluePos !== false)
		{
			$rawTestCasePrefix = substr($stringID, 0, $gluePos);
			$rawExternalID = substr($stringID, $gluePos+1);

			$externalID = is_numeric($rawExternalID) ?  intval($rawExternalID) : 0;
	
			$sql = "SELECT DISTINCT NH.parent_id AS tcase_id" .
                   " FROM {$this->tcversions_table} TCV, {$this->nodes_hierarchy_table} NH" .
	               " WHERE TCV.id = NH.id " .
	               " AND  TCV.tc_external_id = {$externalID}";

			$testCases = $this->db->fetchRowsIntoMap($sql,'tcase_id');
			if(!is_null($testCases))
			{
				$testCasePrefix = $this->db->prepare_string($rawTestCasePrefix);
	      		$sql = 	"SELECT id FROM {$this->testprojects_table} " .
	               		"WHERE prefix = '" . $testCasePrefix . "'";
				$recordset = $this->db->get_recordset($sql);
				if(!is_null($recordset) )
				{ 
					$tproject_id = $recordset[0]['id'];
					foreach($testCases as $tcaseID => $value)
					{
	        			$path2root = $this->tree_manager->get_path($tcaseID);
						if($tproject_id == $path2root[0]['parent_id'])
						{
	          				$internalID = $tcaseID;
							break;
	        			}
	      			}
	      		}	
			}
		}
		return $internalID;
	}