We are currently using WF4, but also had this problem in WF3. Our engineering group has experienced, several times, the disappearance of datum planes from existing assemblies. We have components constrained to the default datums, or created datums that stay constrained. However, the datum planes are missing from the model. They do not show in the model tree, and you can not find them if you do a search for datum planes. I have even had a problem where I have been working in an assembly, created a datum plane, constrained a component to it, then the plane disappeared. I do not recieve any errors when this happens, and the parts are fully constrained to the plane when you edit definition. We can not figure out what is going on. Any help would be appreciated.
Edited by: ROBERT21v
Edited by: ROBERT21v