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java.lang.NullPointerException at owltools.cli.GafCommandRunner.gafTermCounts(GafCommandRunner.java:690) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at owltools.cli.CommandRunner.runSingleIteration(CommandRunner.java:3891) at owltools.cli.CommandRunnerBase.run(CommandRunnerBase.java:76) at owltools.cli.CommandRunner.run(CommandRunner.java:237) at owltools.cli.CommandRunnerBase.run(CommandRunnerBase.java:68) at owltools.cli.CommandRunner.run(CommandRunner.java:237) at owltools.cli.CommandLineInterface.main(CommandLineInterface.java:12)