This was a pristine download. I have not changed or editted anything, until the ant script didn't work. In the db folder are twin sets of persistence.xml files, a PAIR for each, jbpm and task. One has a JPA1 label and one has a JPA2 label. The ant install.demo want to copy just jbpm-persistence.xml not jbpm-persistence-JPA2.xml or whatever. I can fix the ant script, no problem and the thing install to completion. That is not the problem.
The problem is the error I show above, which appears to have nothing to do with JPA persistence and everything to do with the underlying JBOSS VFS. I'm not a JBoss guy so I have no idea what that is or why the JBoss team felt they had to write their own virtual filesystem but the error I am getting has something to do with that and how it may be interacting with my local Windows 7 filesystem. My "H:" drive is a windows network drive....maybe that's the problem?