Update Diagram fails on "No Connect" Cosim block

Currently we have a blackbox instantiation for our simulink block representation of a handwritten HDL module. Within the black-box, we have instantiated a cosim block for the sake of simulation.

At a higher level, we have defined a variant subsystem where one variant has the cosim block configured for simulation while the other has the cosim block configured as "No Connect" (to speed up HDL code generation).

The issue is that the variant configuration with the "No Connect" is generating this error:

Error reported by S-function 'shdlcosim' in 'dtc_core_system/DTC_CORE/DSP_band_0/RX Path/rx_chan/chan_wrapper/Stratus_Channelizer_No_Connect/Channelizer/no_tdm_Channelizer/S-Function': Handshaking with the server failed - Server was NOT an 'HDL Link' server, change the port

Port shouldn't matter for a cosim block in "No Connect" form. In prior projects, this issue did not used to happen. Currently using Matlab 2020b.

Answer 1

[Kiran Kintali]

Can you share a sample model with your usecase?

[Darryl Yu]

Is it possible to convert this to an internal case? Feel a little uneasy sharing our models to a public forum.

[Kiran Kintali]

You can reach out to MathWorks support team for specific usecase questions to connect to the right audience directly.

[Darryl Yu]

Ok got it. I will go ahead and pursue that route. Will try to close out the answer to this question myself once I receive the answer. Thank you for your help!