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ok ,got it Norm. Thank you. I will get back in case I get any doubts further.

But my doubt is, the code I am executing is that of a standard tool which is installed in the cluster since a long time.
How can execution with a different definition of the class happen after...

Exception in thread "main" java.lang.NoSuchMethodError: org.apache.commons.io.FileUtils.moveFile(Ljava/io/File;Ljava/io/File;)


a program of mine is making a call to this method . It was working...