private static void launchTransformation(String trURI, String trName,
			boolean generateTrace, Resource chessModel, Resource feiModel, IProgressMonitor monitor) throws Exception{
		
		String chessModelURIString = chessModel.getURI().toString();
		
		String feiModelURIString = feiModel.getURI().toString();
		
		String qvtTraceURIString = generateTrace ? chessModelURIString.substring(0,
				chessModelURIString.lastIndexOf('.') + 1) + "qvtotrace" : null;
		
		String trURIString = trURI;

		ILaunchManager manager = DebugPlugin.getDefault().getLaunchManager();
		ILaunchConfigurationType c = manager
				.getLaunchConfigurationType(QvtLaunchConfigurationDelegate.LAUNCH_CONFIGURATION_TYPE_ID);
		ILaunchConfigurationWorkingCopy instance = c.newInstance(null, trName);
	
		instance.setAttribute(IQvtLaunchConstants.CLEAR_CONTENTS + "1", true);
		instance.setAttribute(IQvtLaunchConstants.CLEAR_CONTENTS + "2", true);
		instance.setAttribute(IQvtLaunchConstants.ELEM_COUNT, 2);
		instance.setAttribute(IQvtLaunchConstants.FEATURE_NAME + "1", "");
		instance.setAttribute(IQvtLaunchConstants.FEATURE_NAME + "2", "");
		instance.setAttribute(IQvtLaunchConstants.MODULE, trURIString);
		instance.setAttribute(IQvtLaunchConstants.TARGET_MODEL + "1", chessModelURIString);
		instance.setAttribute(IQvtLaunchConstants.TARGET_TYPE + "1", "NEW_MODEL");
		instance.setAttribute(IQvtLaunchConstants.TARGET_MODEL + "2", feiModelURIString);
		instance.setAttribute(IQvtLaunchConstants.TARGET_TYPE + "2", "NEW_MODEL");
		
		if (generateTrace){
			instance.setAttribute(IQvtLaunchConstants.TRACE_FILE, qvtTraceURIString);
			instance.setAttribute(IQvtLaunchConstants.USE_TRACE_FILE, generateTrace);
		}
	
		QvtTransformation qvtTransformation = new QvtInterpretedTransformation(
				QvtLaunchConfigurationDelegateBase.getQvtModule(instance));
		
		IStatus status = QvtLaunchConfigurationDelegateBase.validate(
				qvtTransformation, instance);
		
		if (status.getSeverity() > IStatus.WARNING) {
			throw new CoreException(status);
		}
	
		EvaluationMonitor execMonitor = createMonitor();
		Context context = QvtLaunchUtil.createContext(instance);
	
		OutputStreamWriter s = new OutputStreamWriter(CHESSProjectSupport.CHESS_CONSOLE);
		context.setLog(new WriterLog(s));
		context.setMonitor(execMonitor);
		//begin attempt
		Map<String, String> configMap = new HashMap<String, String>();
		Set<QvtConfigurationProperty> configProps = qvtTransformation.getConfigurationProperties();
		for (QvtConfigurationProperty qvtConfProp : configProps) {
			if(qvtConfProp.getName().equals("systemName")){
				configMap.put(qvtConfProp.getName(), "attempt");
				/**
				 * "attempt" will be a String selected by a user through a dialog 
				 * at run-time passed as parameter to this function
				 */
			}
		}
		instance.setAttribute(IQvtLaunchConstants.CONFIGURATION_PROPERTIES, configMap);
		//end attempt
		QvtLaunchConfigurationDelegateBase.doLaunch(qvtTransformation,instance, context);
		qvtTransformation.cleanup();
	}