Exception trying OpenID support

[Jaume Moral Ros]

Hi everybody!

I'm trying to configure my CAS to use as OpenID server. I followed the 
wiki page http://www.ja-sig.org/wiki/display/CASUM/OpenID

But I get an exception when trying to login in an external OpenID 
application with my OpenID user (which is 
http://www.fib.upc.es/openid/a0000000)

org.springframework.web.util.NestedServletException: Request processing 
failed; nested exception is 
org.springframework.webflow.engine.ActionExecutionException: Exception 
thrown executing [AnnotatedAction at 270664 targetAction = 
org.jasig.cas.web.flow.GenerateServiceTicketAction at 2f54, attributes = 
map[[empty]]] in state 'generateServiceTicket' of flow 'login-webflow' 
-- action execution attributes were 'map[[empty]]'; nested exception is 
java.lang.NullPointerException


Everything works OK without OpenID (normal CAS server)

Any idea? Whan can I do?

Jaume Moral
LCFIB