java.lang.ClassNotFoundException: oracle.bpel.services.workflow.WorkflowException

When deploying or running an ADF application with BPM functions, it might throw the error as below:

java.lang.NoClassDefFoundError: oracle/bpel/services/workflow/WorkflowException

Here is the solution for it:

In your ADF project, open weblogic-application.xml in Application Resources Palette and add the below lines:

<library-ref>
	<library-name>oracle.soa.workflow.wc</library-name>
</library-ref>

Which looks like the below: