Dataflow Conversion Error when generating hdl code from simulink

I try to generate HDL Code form Simulink Subsystem Block and then it shows an error when I try to run from HDL Workflow Advisor in section 3.2 Generate RTL Code and Testbench. Here's an error

Failed Error:Dataflow conversion error: Function2SubsystemConverter.evalExpression: 0: variable description not found for the specified loop iteration

Error using hdlcoder.pirctx/earlyElaborate

Error:Dataflow conversion error: Function2SubsystemConverter.evalExpression: 0: variable description not found for the

specified loop iteration

Error in slhdlcoder.HDLCoder/runPIRTransformAndCodegen

Error in slhdlcoder.HDLCoder/makehdl

Error in downstream.DownstreamIntegrationDriver/runGenerateRTLCodeAndTestbench

Error in runGenerateRTLCodeAndTestbench

Error in Simulink.ModelAdvisor/executeCheckCallbackFct

Error in Simulink.ModelAdvisor/run

Error in Simulink.ModelAdvisor/runCheck

Error in ModelAdvisor.Node/runTaskAdvisor

Related documentation

Failed Generated HDL code.

Answer 1

[Kiran Kintali]

This is an unexpected error and seems related to this bug report.

https://www.mathworks.com/support/bugreports/3054173

[Marshanda Febriana]

Based on the link you've provided, I've upgraded my Matlab version to Matlab 2023b ver 7. But, I received another error, but it looks like it has the same cause. Here's the error

Error:Dataflow conversion error: PIRGraphBuilder.instantiateSumNode: 0: Index exceeds the number of array elements. Index must not exceed 7.

[Kiran Kintali]

This unexpected error is encounteded due to sum function with 3D inputs does not seems to be implemented yet in this HDL Coder workflow. I have created an enhancement request to the development team to address this issue.

For now please consider splitting the matrix manually for 'add', you can do something like x(:,:,1)+x(:,:,2)+x(:,:,3) should work.

Please share the model with the respective fix if you continue to run into other issues.

Hope this helps.