incompatible xml parser... I do not know which version jBPM needs, but yours is not the right one. Try using a newer version of your xml parser
This is because you might be using older version of xalan, xerces jars.
Try to update the latest versions of these jars.I did not tried with this approach.
My approch i s:
create a folder in jrehome\lib folder with name "endorsed" and put the following jars in it.
It works for me.