Mieltawil,
A full package model can be generated either from Allegro Package SI 620, or Allegro Package Designer 620 (I assume we are referring to the 15.5.1 release). IBIS is, indeed, one of the options for that model.
This capability has been available for almost two years. Many of our customers use the 3D extraction module to extract entire package models (any other customers online?; please "chime in").
Without the specifics of "does not work properly", I can't really speak to what you have heard. If you do find some specific issues, however, please work with your local AE or our CS personnel to get them resolved.
I would encourage you to try it.
Best Regards,
Bill Acito
Packaging Tech Marketing Manager
Cadence - Chelmsford, MA
Originally posted in cdnusers.org by BillAcito