BioJava local workers fail

WARN  2013-10-10 16:10:27,190 (net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Invoke:236) - Failed (INVOCATION) invoking Local service net.sourceforge.taverna.scuflworkers.biojava.SwissProtParserWorker for job DispatchJobEvent facade2:Workflow12:Read Swiss Prot File[]: Error evaluating the beanshell script net.sf.taverna.t2.activities.beanshell.BeanshellActivity$1@4798ee5e

Sourced file: inline evaluation of: ``import org.biojava.bio.seq.Sequence; import org.biojava.bio.seq.SequenceIterator . . . '' : Typed variable declaration : Class: SequenceIterator not found in namespace : at Line: 26 : in file: inline evaluation of: ``import org.biojava.bio.seq.Sequence; import org.biojava.bio.seq.SequenceIterator . . . '' : SequenceIterator 

	at bsh.BSHAmbiguousName.toClass(Unknown Source)
	at bsh.BSHType.getType(Unknown Source)
	at bsh.BSHTypedVariableDeclaration.eval(Unknown Source)
	at bsh.Interpreter.eval(Unknown Source)
	at bsh.Interpreter.eval(Unknown Source)
	at bsh.Interpreter.eval(Unknown Source)
	at net.sf.taverna.t2.activities.beanshell.BeanshellActivity$1.run(BeanshellActivity.java:171)
	at java.lang.Thread.run(Unknown Source)