Is it possible to access the blocks inside the model under test from the test harness in custom criteria script of simulink test?

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I would like to verify the datatype of inports and outports of a model in simulink test. So I created a test harness for it and when I try to access the inports inside the model under test in test harness from the custom cirteria script of simulink test, it doesnt work.
function ioAnalysisFunc(test)
res = get_param(strcat(test.sltest_bdroot, '/Model1/Inport1'), 'OutDataTypeStr'); % Here test.sltest_bdroot is the test harness 'Model1_Harness'
assignin('base', 'ress_out', res{1});
end
The error thrown is,
--------------------------------------------------------------------
Error occurred in custom criteria and custom criteria assessment did not run to completion.
--------- Error ID: ---------
Simulink:Commands:InvSimulinkObjectName
-------------- Error Details: --------------
Invalid Simulink object name: 'Model1_Harness/Model1/Inport1'.
--------------------------------------------------------------------

Accepted Answer

Fangjun Jiang
Fangjun Jiang on 13 Aug 2024
I think the testing harness model is using the Model block to reference the model under test, so you can't access the block directly like that inside a model reference.
I would suggest getting the data type of the signal that is feeding into "Inport1". In most cases, it is the same as the data type of the output of "Inport1".
  2 Comments
Jerome Almon
Jerome Almon on 13 Aug 2024
Edited: Jerome Almon on 13 Aug 2024
Thanks for your reply. This is what I am doing right now. (Getting the datatype of the input signal using the simulation output log in custom criteria script.)
However it would be really useful if there exists a way to access the blocks inside the model under test. Ofcourse not to modify anything, but ony read access (eg. get_param()) should be good enough. Since we decided to maintain the whole UT only using simulink test, this feature would be really helpful. Is it not possible at all ? Or is there any other alternative to read the properties of the blocks inside the model under test from simulink test ? Thank you.

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