javadoc -docencoding failed due to resource problem.

sishida@stones[96] javadoc -docencoding
java.lang.Error: Fatal: Resource for javadoc is broken. There is no main.requires_augument key in resource.
        at sun.tools.javadoc.Main.getText(Main.java:120)
        at sun.tools.javadoc.Main.getText(Main.java:104)
        at sun.tools.javadoc.Main.getText(Main.java:100)
        at sun.tools.javadoc.Main.main(Main.java:245)


TYPO: main.requires_augument -> main.requires_argument