Within a simulation project, when I regenerate a mesh and then “Select Mesh as Domain” and then click “Reset Assignments”, nothing happens. But if I refresh the browser, then I can select “Select Mesh as Domain” and everything works as normal. It seems to be right after the new mesh is generated that there is a problem with “Reset Assignments”.
It is with this project and pretty much any simulation:
It seems to be an unintended effect, which will be reported.
For the moment, you can try deleting previously defined materials/boundary conditions (and perhaps other things you might have assigned, such as result controls) and trying to reset the assignments.