java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at java.io.Reader.(Reader.java:66)
at java.io.InputStreamReader.(InputStreamReader.java:85)
at java.io.InputStreamReader.(InputStreamReader.java:74)
at java.util.Properties.load(Properties.java:176)
at enlogix.GenToken.GetGenTokenProperties(GenToken.java:294)
at enlogix.GenToken.GenerateToken(GenToken.java:152)
at undefined.GenTokenTester.main(GenTokenTester.java:12)

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