Model Protection Limitations

There are various restrictions on simulations that include password-protected models. Some restrictions are imposed to protect the information contained inside the protected model, while other restrictions will be lifted in future releases.

The process of running a simulation with a model that includes imported protected models is the same as for a model that does not contain imported protected models. Various limitations on output file formats and solution output will be imposed when parts of the simulation are protected. Some parts of text files (such as the .pre file) will be encrypted and will not be editable or readable. The solver will limit details written to the screen as well as output files and certain output files, such as export of files for thermal analysis, are not supported and if requested, the setting to write out these files will be ignored.

Requests

Some requests, most notably currents, will be excluded from the simulation even if the requests are defined. Near fields can be requested and will be calculated, but only the results that fall outside the bounding box of the protected part will be available. Warning and error messages in the CADFEKO notification centre will indicate where these limitations are applied.

Solution Methods

When using a protected component, it is important to know which methods and techniques may be used together. FDTD is not supported with model protection. Generally, where settings conflict between the protected component and the rest of the model, the rest of the model settings will take precedence (this is indicated by warnings in the Model Status and/or simulation output).

Table 1. Supported solver combinations of the protected component and the rest of the model (in addition to the general supported solution method and technique combinations).
Protected Component	Rest of Model
	MoM (incl. SEP and VEP)	MLFMM	PO	RL-GO	UTD	FEM
MoM (incl. SEP and VEP)	Yes Windscreen method may be used in the rest of the model.	Yes MLFMM will be applied to the full simulation.	Yes	Yes	Yes	Yes Connections or intersections involving FEM regions may not be supported.
MLFMM	Yes MLFMM will not be applied to the protected component.	Yes	No	No	No	Yes
PO	Yes	Yes	Yes	No	No	No
RL-GO	Yes	No	No	Yes	No	No
FEM	Yes	Yes	No	No	No	Yes FEM regions in the protected component and the rest of the model should not intersect.

2D Results in POSTFEKO

Results can be plotted on 2D and surface graphs and post-processed as normal.

3D Results in POSTFEKO

Fek files which include protected models cannot be loaded into POSTFEKO.

Attention: This means that models that contain protected parts cannot be visualised in the 3D view in POSTFEKO.

Results that can be viewed in the 3D view (such as far fields) need to be copied to a custom dataset before adding them to a 3D view.