Simulink model error: Brace indexing is not supported for variables of this type.

3 views (last 30 days)
I'm not sure why I'm getting this error with Simulink. I thought perhaps it was related to "local" vs. "scoped" variables (local having [] and scoped {}), but that doesn't appear to be the case. One challenge is that the Diagnostic Viewer doesn't give me a link to where in the model the error comes from, and the only description is: Brace indexing is not supported for variables of this type.

Answers (1)

Shadaab Siddiqie
Shadaab Siddiqie on 2 Aug 2021
From my understanding you are getting an error in your Simulink. This error message may stem from an uncaught syntax error in your reference design plugin file (plugin_rd.m). For example, if the 'CustomConstraints' property of the hdlcoder.referencedesign class is specified as a char array:
hRD.CustomConstraints = 'myConstraints.xdc';
instead of a cell array:
hRD.CustomConstraints = {'myConstraints.xdc'};
Starting from R2020a, validation for this property was added, so it will now properly error out. You can see this by running the following code in the latest release:
>> hRD = ZedBoard.vivado_base_2018_1.plugin_rd;
>> hRD.validateReferenceDesign;
which will error out with the message:
Invalid property value for property "CustomConstraints".
Value must be a cell array of character vectors, for example, hRD.CustomConstraints = {''}.
Dave Hall
Dave Hall on 2 Aug 2021
@Shadaab Siddiqie, quick update: I re-wrote the module, and the problem has disappeared. Not sure what this error was, but I've avoided it for now. Moving on. Thanks for your help.

Sign in to comment.


Find more on Simulink Environment Customization in Help Center and File Exchange




Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!