What is this error message?

I get the following error message after a while in command/terminal mode (2013b):

log4j:WARN No appenders could be found for logger (org.apache.fop.util.ContentHandlerFactoryRegistry).

log4j:WARN Please initialize the log4j system properly.

[per isakson]

See http://blogs.mathworks.com/community/2009/07/06/calling-java-from-matlab/#comment-6655

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/20354-report-generation-toolbox-gives-warnings-and-no-figures-in-r2011b