Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

java.lang.IllegalArgumentException: Namespace  is not defined.  
org.pentaho.reporting.libraries.xmlns.writer.XmlWriter.writeTag(	at	at	at Source)	at Source)	at Source)	at Source)	at	at$_SOReportJobFactory.execute(