References > Creo™ Schematics Installation and Administration Guide > Appendix > License Management Software > Downward License Compatibility Using FlexNet Publisher
  
Downward License Compatibility Using FlexNet Publisher
FlexNet Publisher license servers have downward compatibility with PTC applications using FLEXlm license servers. For example, a Creo Parametric 4.0 license can run Pro/ENGINEER 2001 software, because both releases of the software use the same PTC License Server.
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To run the current release of Creo, you must install FlexNet Publisher version 10.8.x or later. FlextNet Publisher Version 11.13 is shipped with Creo 4.0.