Error at the end of a distributed test

When my distributed test finishes, I see in the log the following lines:

2013/06/30 16:46:52 INFO - jmeter.engine.StandardJMeterEngine: Notifying
test listeners of end of test
2013/06/30 16:46:52 ERROR - jmeter.util.BeanShellInterpreter: Error invoking
bsh method: eval In file: inline evaluation of: ``testEnded(1.2.3.4);''
Encountered "( 1.2 .3" at line 1, column 10.

can you tell me what it means? is it a significant error?