Step 4: Validation Errors

In this step of the tutorial, you will learn about the Validation panel and how it supports you in service development.

This tutorial step is mainly descriptive. The contents of the panel may differ at this point in the tutorial, as they are based on previous user activities

During modeling you are supported by the validation panel. The Designer constantly validates the BPMN process and the implemented execution. The validation results are displayed in the validation panel.

The icon in the panel header indicates if there are any validation issues:

Icon	Description
	Everything is fine. The service is ready to be deployed.
	There are validation issues. You need to resolve these issues before being able to deploy the service.

The items listed in the validation panel are links. You can click an error to select the related BPMN element and display the corresponding execution:

Now you know, how the validation panel works - take a look at the items mentioned in the validation messages that are displayed in your service at this moment. Check if everything is connected correctly and if you used the correct types.

You cannot deploy and start a service that has validation errors marked in red. You need to resolve them first. Nevertheless, your order validation process may still show some information messages in the validation panel. The xUML Compiler may indicate that some variables are not used or that some executions are empty - but these do not prevent you from executing the service at this point:

If no errors are shown in the validation panel, you are ready to retest your process.