xPath Configure failed (NullPointerException): null

my workflow is: table creator-->httpretriever-->httpparser-->xpath.  I got configure error. but if i replace xPath by xml writer i can get xml file correctly. 

the url in table creator is : http://tech.knime.org/forum

please help me to sort it out.

Hi,

where and after which action exactly do you receive the error? Until which node does your workflow execute? Can you enable debug logging in KNIME's preferences and attach a stack trace, if available?

Best,
Philipp

Hi,

thank you for quik reply. I have solved the problem.