Solved
Assembly from Creo 9 is not opening in Creo 7.0 or 8.0
I am using Creo Parametric Release 9.0 and Datecode9.0.2.0
i updated Creo parametric to 9.0.2 and i found an issue that my collegue with version 8.0 and 7.0 are not able to open the assembly

