Connecting a mux to a Matlab 2-Level S-Function with variable sized input dimensions

Hello,

I am developing a custom 2-Level Matlab S-Function for the use in Simulink. I would like to use not a fixed input port dimension, but be able to concatenate signals with a mux block. The resulting signal should then be fed to the 2-Level Function input port, as in the following diagramm.

Unfortunately I stuck at the definitions of the dimensions - if I set the 'DimensionMode' to variable, I get the following error:

Error:Simulink cannot propagate the fixed-size mode from the 'Output Port 1' of 'model/Mux2' to the 'Input Port 1' of 'model/UZ_MonitorInNumeric1'. This input port expects a variable-size mode. Either replace 'model/Mux2' with a block that outputs a variable-size signal or replace 'model/UZ_MonitorInNumeric1' with a block that expects a fixed-size signal.

My definitions in the setup function are:

% Register number of ports

block.NumInputPorts = 1;

block.NumOutputPorts = 0;

% Setup port properties to be inherited or dynamic

block.SetPreCompInpPortInfoToDynamic;

% Override input port properties

block.InputPort(1).DimensionsMode = 'Variable';

block.InputPort(1).Dimensions = [1,10]; %Set Max Dimensions

block.InputPort(1).Complexity = 'Real';

block.InputPort(1).DirectFeedthrough = true;

Is there a way to achieve the desired function within a Matlab 2-Level-S-Function? Thanks in advance!

Answer 1

[Benedikt]

I figured it out - the dimensions do not have to be specified since the inputPortInfoToDynamic option is set:

% Setup port properties to be inherited or dynamic
block.SetPreCompInpPortInfoToDynamic;

% Override input port properties
%block.InputPort(1).DimensionsMode = 'Variable';
%block.InputPort(1).Dimensions = [1,10]; %Set Max Dimensions
%block.InputPort(1).Dimensions = 3;
block.InputPort(1).Complexity  = 'Real';
block.InputPort(1).DirectFeedthrough = true;