Validation Error, Locating and Fixing

I am trying to compile a conforming XML schema to an rnc for use with
nxml.
I do the following:

       1. Compile the Xsd to rng with rngconv.jar from 
          the Sun Multi-Schema XML Validator.
          This appear to go correctly (except for some 
          '"anyType" is implicitly used ...' warnings).

       2. I then convert the rng to rnc using trang or 
          using the or RngToRncText.xsl and the cygwin xsltproc

       3. When I then attempt to load the .rnc with rng-c-load-schema
          I get the following error message:

          Incorrect Schema:"...nxml-mode/schema/xanx.rnc" 
             4318 "Expected `}' but got `+'

I have two questions:

      1. How do I convert the token count into a 
         line the the rnc produced?  I have seen this problem before
         and by shear elimination have managed to get the rnc to 
         work, but would like a better way.

      2. More to the point does this indicate some problem 
         with the xsd or the rng converter?


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