bjc.rgens.newparser.GrammarException: Error in generating case (bjc.rgens.newparser.RuleCase@3508d5aa)
	at bjc.rgens.newparser.RGrammar.generateCase(RGrammar.java:247)
	at bjc.rgens.newparser.RGrammar.generate(RGrammar.java:178)
	at bjc.rgens.newparser.RGrammar.generate(RGrammar.java:138)
	at bjc.rgens.newparser.RGrammarTest.main(RGrammarTest.java:45)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)
	at java.lang.Thread.run(Thread.java:748)
Caused by: bjc.rgens.newparser.GrammarException: Error in generating case element ([Monster/Animals])
	at bjc.rgens.newparser.RGrammar.generateElement(RGrammar.java:282)
	at bjc.rgens.newparser.RGrammar.generateCase(RGrammar.java:229)
	... 9 more
Caused by: bjc.rgens.newparser.GrammarException: No rule '[Monster/Animals]' defined (perhaps you meant ?)
	at bjc.rgens.newparser.RGrammar.generateRuleReference(RGrammar.java:397)
	at bjc.rgens.newparser.RGrammar.generateElement(RGrammar.java:259)
	... 10 more