Icedtea error: "Code source security was null" found in the log

Issue

• Icedtea error: "Code source security was null" found in the log:

  Application is trying to get permissions for file:/C:/Users/someone/application-some-jars.jar, which was not added by standard way. Trying         to download and verify!
  ...
  The application may have trouble continuing
  java.lang.NullPointerException: Code source security was null
          at net.sourceforge.jnlp.runtime.JNLPClassLoader.getPermissions(JNLPClassLoader.java:1234)
          at net.sourceforge.jnlp.runtime.JNLPPolicy.getPermissions(JNLPPolicy.java:88)
          at net.sourceforge.jnlp.runtime.JNLPPolicy.implies(JNLPPolicy.java:199)
  ....