java.lang.NullPointerException
net.sf.taverna.t2.activities.rshell.RshellConnection.<init>(RshellConnection.java:55)
net.sf.taverna.t2.activities.rshell.RshellConnectionManager.createConnection(RshellConnectionManager.java:83)
net.sf.taverna.t2.activities.rshell.RshellActivity$1.run(RshellActivity.java:142)
java.lang.Thread.run(Thread.java:636)