Trying Jawin

I am new to Jawin and I have 3 questions:
* does the stub generator have an equivalent of the /xh
  option of jactivex (MS JVM)?
* what is the performance impact of the Jawin approach
  as opposed to raw JNI?
* why did my very first attempt to generate stubs against
  a type library end in:

  bash-2.05b$ java -jar jawinBrowser.jar
  Loaded TypeLibWrapper
  Loaded TypeLibWrapper
  [DEBUG] ********************************************
  [DEBUG] TypeInfo GUID: GUID{6aca9bc0 7b22 11d1 00 00 00 00 00 00 00 00}
  [DEBUG] TypeInfo Locale: 0
  [DEBUG] TypeInfo Platform: 1
  [DEBUG] TypeInfo Major version: 1
  [DEBUG] TypeInfo Minor version: 0
  [DEBUG] TypeInfo Flags: 8
  java.lang.RuntimeException: org.jawin.COMException: 80070057: null
        at
org.jawin.browser.typelib.TypeParser.buildUserDefinedDescription(TypeParser.java:921)

   Please note that jactivex is able to generate wrappers
   for that library but reports one error:

      tagRemSNB.java(rgString): warning: skipped. Cannot be used as a
      structure field.

   FYI, other errors reported by jactivex (though not on this library)
   are of the "warning: skipped. Too many indirections." variety.

Thanks in advance,

-- O.L.