I am having a problem that the documentation discusses but doesn't seem to give a clear enough solution. I have my extended both Category and priority using the examples provided. I am getting the ClassCastException problem (as alluded to in docs\api\org\apache\log4j\examples\doc-files\mycat.good ). The mycat.good file shows the following: # Setting the category factory to MyCategoryFactory solves the # ClassCastException problem encountered with the "mycat.bad" # configuration file. log4j.categoryFactory=org.apache.log4j.examples.MyCategoryFactory My question is: How do I set this in an XML config file ? The DTD seems to say nothing about Factories. Yes, I have read (over and over) the "Adding Conversion Characters to Pattern Layout" documentation. The "Configurators" section alludes to this problem, but it doesn't give me a concrete example of what to do to avoid the problem. ---------------------------------------------------------------- Jay Riddell Dorado Software --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]