No login context available

[Peter Schober]

* Manuel Subredu <manuel.subredu at roedu.net> [2013-01-07 11:22]:
> But, after I'm authenticated by the LDAP subsystem, I get an error
> and on the shib/logs/idp-process.log I get
> 
> 12:17:49.060 - WARN
> [edu.internet2.middleware.shibboleth.idp.authn.AuthenticationEngine:147]
> - No login context available, unable to return to authentication engine

How do you test the authentication? With a SAML SP of our own?
-peter