Problem with ORM to generate code and DB from classes

I try to use ORM to generate code and DB from a class diagram (not very complicated), but it only generates entity from classes - the new entity relationship diagram is empty, no code is generated and no error is reported.

The exception caught in the vp.log is :

at v.idob.f(:116)
at v.idob.i(:107)
at v.idob.i(:95)
at v.idob.i(:65)
at v.dzo.i(:125)
at v.dzo.i(:94)
at v.inl.f(:28)

Dear Antoine,

Thank you for your information, we will investigate this problem as soon as possible.