Thanks for the response. However, I'm not getting the meaning of this. Licenses are not backwards compatible, are they? If I get Creo 12.0, I cannot acquire a perpetual license, but you stated Creo 12.0 will recognize both subscription and perpetual. I logged a support case, and PTC will not answer the simple "yes or no" question, but turned it over to the Sales Department, and I have not heard back. When did PTC no longer offer perpetual licenses? Is the license now only subscription based for Creo Parametric?