Starting with version R2026xFD01, the new SIMULIA kinematics model has been unlocked. This model offers advanced capabilities for mechanism simulation (not used with a standard usage of robotics simulation). It also provides compatibility between CATIA, DELMIA and XDESIGN (web apps) models. 

Since version R2026_FD01, the preference setting activating per default this new kinematics. 

Therefore, all new mechanism will use this new kinematic data model. The old mechanism model remains usable.

For reasons we are currently investigating, some users have reported  limitations and update issue when creating a mechanism with this new model.  Therefore, while we work to resolve this issue, we strongly recommend disabling the activation of this new kinematic model by unchecking the corresponding option in the preferences.

We are sorry for this situation and will keep you informed of any developments.

Thank you for your understanding.