In Device latest version (6.0.1044) the solver and the CAD are linked as follows:
It is impossible to send the Charge based calculation to the queue if the CAD is open. This is true even when the Charge is set to ‘false’ in the Resource tab.
While the solver (Charge) is running in the queue, it is impossible to view simulation results in the already completed simulation files. In addition, although the basic editing of the structures is possible adding new implants is not allowed.
This linkage between the CAD and simulation engine does not exist in the FDTD and is inconvenient for Device. Ideally, viewing simulation results and editing simulation files shall not be impacted by the engine run.
Note, it is possible that the same behavior existed in previous versions as well.