I have just made a simple HelloWorld application in which I put a human task process which has a {taskName}.ftl file containing only a complete button. Then add {processDefinitionId}-image.png.
Then added png,ftl & bpmn file to guvnor default package.
These steps are same as mentioned in tutorial.
I m using jbpm 5.1.0 final installer, jboss 5.1.0G.A.,Eclipse Helios.
And I am getting this error in guvnor build console.