Update Short History in BPEL Task Form / Worklist

Question

Hi all,
I'm currently facing a problem and hopefully to get some idea or solutions from here. It is about how to update the task:shortHistory. The reason to do this is due to I have to manually update the track history / short history in the task form from BPEL.
Currently while I tried to update the shortHistory(in one of the human task), it keeps throw me the error with some kind of zero node in the task:shortHistory. Just right before I assign or append the task:shortHistory, I did copy the global human task variable to the update task variable, so it should carry forward the existing shortHistory.
Below is the error from BPEL console:
<selectionFailure xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/">
-<part name="summary">
<summary>
XPath query string returns zero node.
According to BPEL4WS spec 1.1 section 14.3, The assign activity &lt;to&gt; part query should not return zero node.
Please check the BPEL source at line number "493" and verify the &lt;to&gt; part xpath query.
</summary>
</part>
</selectionFailure>
the <to> part query should be the task:shortHistory node, please help if you have any idea on this.
Thanks.
Jyno
Edited by: loneboy62 on Nov 11, 2009 10:28 PM

Answer 1

Make sure that your result varaible is al ready 'prepared'. It can not assign, because the variable does not coantins this element (only in the definition).
Solution 1: use the assign XML fragment to add this element in your variable.
Solution 2: Use a stylesheet to to create this 'empty' element.
Marc
http://orasoa.blogspot.com