HI Thomas Setiabudi,
Thank you very much，
However, the fact should not be so.I import my eclipse space jbpm5.3 official website examples perform this error occurs, I do not know that this is not the way I performed wrong, or something else?I first to ant start.demo, then I went eclpse the perform humantask above.You seen the the jbpm-example above, the example?Is which humantask package following
Regards，
Zhao Lu