Inactive buttons in DEVICE

I have a problem with lumerical DEVICE (2016a), when I open it,some practical buttons like in following picture are inactive and thus can’t use them. What’s wrong? How can I active them?
In DEVICE (2015b) all of the buttons are active and it has no problem!

Best Regards,

Hi @hananeh. The DEVICE environment now supports two solvers. The electrical solver (CHARGE) and the thermal solver (HEAT). Depending on which solver is present in the objects tree, the corresponding simulation objects (monitors, sources, doping, etc.) become available to the user. When the software opens up, since there are not solver placed in the objects tree yet, all the simulation object buttons are disabled. As soon as you place a solver region in the objects tree, the corresponding buttons will become enabled and you will be able to use them.

4 posts were split to a new topic: Graphene model in DEVICE