Hi Carl,
I understand that you want to terminate your simulations with an error message that is generated from a Stateflow chart contained inside a model reference.
Based on your description to rule out the Assertion Block, Stop Block and S-function due to their limitations, here is a possible workaround:
- An approach would be to leverage the MATLAB function block to output a signal/flag whenever a fatal condition is encountered by the Stateflow chart.
- In addition to this, an event listener script in MATLAB that monitors the simulation for a specific error flag to be raised/change in signal can be used.Please refer to the below documentation to know more about the “add_exec_event_listener” function: https://www.mathworks.com/help/simulink/slref/add_exec_event_listener.html
- Lastly detecting the change in the error flag from the Data Store Write block and stoping the simulation. Please refer to the below documentation to know more about the “Data Store Write” block: https://www.mathworks.com/help/simulink/slref/datastorewrite.html
Here is a code snippet for your reference:
% Define the data store name
dataStoreName = 'errorFlagDataStore';
% Create the event listener
listener = add_exec_event_listener(bdroot, 'PostOutputs', @(src, event) checkErrorCondition(dataStoreName));
function checkErrorCondition(dataStoreName)
% Get the value of the data store
errorFlag = evalin('base', dataStoreName);
% If the error flag is set, stop the simulation and throw an error
if errorFlag
set_param(<Parent Model Name>, 'SimulationCommand', 'stop');
error('A fatal error condition was detected.');
end
end
A “Data Store Write” block is used to write the error flag and make it accessible in the MATLAB workspace for the event listener to perform the necessary actions based on the error condition. It then terminates the simulation by throwing the desired error message.
Hope it helps,
Regards,
Ayush Misra
