Taverna 2.2.0 includes improvements to the Workbench user interface and gives users greater control over the workflow engine. Here are a few of the new features in the Workbench:

• Loading and sharing of service sets
• Ability to load and edit workflows that contain services that are offline
• Reporting on the state of the workflow
• Tabular representation of a workflow run
• Retrying and parallelization of service calls
• Consistent representation of the intermediate and workflow results
• Pause/resume/cancel of a running workflow

Taverna 2.2.0 also includes the Command Line Tool that allows you to execute workflows outside of the Workbench. The Command Line Tool is available either bundled with the Workbench or as a separate download.

Tutorials and examples

Tutorials for Taverna are available under the Taverna 2.x documentation.

Example workflows can be found under the Starter pack tab in the myExperiment perspective of the Workbench.  They can also be downloaded from the myExperiment Web site at http://www.myexperiment.org/packs/122.

Known issues

Although Taverna 2.2.0 contains many improvements there are some known issues with it. These are detailed in known-issues.txt in the download bundle. An updated and more detailed list can be found in our issue tracker Jira at:
http://www.mygrid.org.uk/dev/issues/secure/IssueNavigator.jspa?mode=hide&requestId=10171.

Taverna and Java

Taverna requires the Java Runtime Environment (JRE) version 5 or 6 from Sun. No other versions of Java have been tested.

Java on Linux

Some Operating Systems, such as Ubuntu, come with the Gnu GCJ version of Java that cannot be used to run Taverna due to bugs in GCJ.

To download Sun Java 6 for Ubuntu, start a Terminal and type the following:

sudo apt-get install sun-java6-jre

and follow the instructions. You might also have to switch the default Java installation by running something like

sudo update-java-alternatives -s java-6-sun

Read more details about Taverna’s system requirements, in particular how to set the location of the Graphviz binary dot if needed.

Licence and source code

Taverna is distributed under the LGPL 2.1 licence.

The source code for Taverna can be retrieved from our Subversion repository.  We also recommend you to sign up to the taverna-hackers mailing list if you are a developer.

Reporting problems

If you find any problems that are not listed in known-issues.txt, then please send them to the taverna-users or taverna-hackers mailing lists. Our support team is monitoring the mailing lists and will try to respond to questions as soon as possible.

If you prefer not to subscribe to our mailing lists, you can send your questions directly to support@mygrid.org.uk and a member of our support team will respond to your inquiries.

• Copy/paste, shortcuts, undo/redo, drag and drop
• Animated workflow diagram
• Remembers added/removed services
• Secure Web services support
• Up-to-date R support
• Intermediate values during workflow runs
• myExperiment integration
• Excel and csv spreadsheet support

Taverna 2.1 has been designed to improve the user-experience, the range of available services, include support for more industry standards, and ease the design and execution of workflows.