OPP exception / Debug OPP

Hi, i 'm trying to generate my proxies and factories through OPP but i
can't... this is the exception stacktrace:

postprocess.opp:
     [echo] -------- Run OPP / Generate Ozone Proxies source code --------
     [java] Begin OPP...
     [java]    Processing class: biz.UsuarioImpl
     [java]    Begin Processing biz.UsuarioImpl...
     [java]       Begin Resolving update methods...
     [java]          No ocd was found!
     [java]       End Resolving update methods
     [java]    End Processing biz.UsuarioImpl generated in 0.068 seconds.
     [java]    Generation completed with 0 warnings and 0 errors
     [java] java.lang.ArrayIndexOutOfBoundsException: 0
     [java]     at
org.ozoneDB.tools.OPP.srcgen.builder.FactoryBuilder.beginClass(FactoryBuild=
er.java:207)
     [java]     at
org.ozoneDB.tools.OPP.srcgen.builder.CompositeBuilder.beginClass(CompositeB=
uilder.java:37)
     [java]     at
org.ozoneDB.tools.OPP.srcgen.direct.ReflectionClassDirector.build(Reflectio=
nClassDirector.java:92)
     [java]     at
org.ozoneDB.tools.OPP.OPP.makeProxiesAndFactories(OPP.java:239)
     [java]     at org.ozoneDB.tools.OPP.OPP.generate(OPP.java:159)
     [java]     at org.ozoneDB.tools.OPP.OPP.main(OPP.java:127)

BUILD FAILED

i 'm using ant to build, my project is just
two classes in the biz package and two remote interfaces in the bizint pack=
age

by the way.., how could i debug OPP within the eclipse ide??

i hope you lend me a hand on this
cheers


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