Dear Stian,

thank you very much for your help. I had a look at the MyLauncher application and try to understand how it works. Afterwards I changed my code in:

TavernaSPIRegistry.setRepository(((LocalArtifactClassLoader)getClass().getClassLoader()).getRepository()); File workflowXmlFile = new File(workflow); URL workflowURL = workflowXmlFile.toURI().toURL(); WorkflowLauncher launcher = new WorkflowLauncher(workflowURL); outputs=launcher.execute(inputs);

But now I got this Java Exception: java.lang.ClassCastException: sun.misc.Launcher$AppClassLoader at this line: TavernaSPIRegistry.setRepository(((LocalArtifactClassLoader)getClass().getClassLoader()).getRepository());

Any idea how can I solve this problem? And do you know a good documentation web site for Raven?

If the Web Service is ready, I will be happy to use it :-), but at the moment I am afraid I have to use this solution.