argument type mismatch

[Jun Hong]

Hi guys,
I got an Exception:
End event threw exception
java.lang.IllegalArgumentException: argument type mismatch
Does anybody know the cause of this Exception?
Jun Hong

[Mapraputa Is]

" * Thrown to indicate that a method has been passed an illegal or inappropriate argument"
IllegalArgumentException.java. Comments.
Now if you want to know what caused the exception, you should probably post some code.