[rules-users] Guvnor importing model error

Hi, I get errors after I import my (JAXB-generated) model in Guvnor. The original schemas are rather complicated, and thus the generated model depends heavily on inheritance. Could that be the problem? The message I get is: Unable to validate package configuration (eg, DSLs, models) for [my_package]. Suggestion completions may not operate correctly for graphical editors for this package. I don't get any completions... (but I guess that is to be expected after this error) I'm using drools-5.0-guvnor-standalone, Java 1.6 and JAXB version 2.2.1 Can anyone point me in the right direction? Thanks -- Mylene