Question

How to resolve the error 'declaration is incompatible with "<variable declaration>"' when generating code with Embedded Coder R2025b?
I am generating code from my Simulink model using Embedded Coder in R2025b. I have included a manual variable declaration in the...

28 days ago | 1 answer | 0

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Why do I receive License Manager Error 4402 when launching MATLAB using a Login Named User license?
"License Manager Error 4402" may indicate that the product attempting to be licensed via Login Named User is not available on th...

28 days ago | 0

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How do I access my Online Training Suite?
To access the Online Training Suite, you must be linked to an Online Training Suite License.  You can link to an Online Tra...

28 days ago | 0

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Why am I getting a "Firmware Build Failed" error while building the UAV Toolbox Support Package for PX4 Autopilots
The cause of the build failed error is most likely a permission issue. Launch MATLAB R2022b with "Run in Administrator" and try ...

28 days ago | 0

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How to stop a "timer" inside a handle "class" when the handle is cleared in MATLAB?
"clear" does not delete handle objects. It deletes their references. When the reference count to a handle object drops to 0 (i.e...

28 days ago | 0

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Why am I getting the error "found unsupported dynamic matrix type" in HDL Coder R2024b?
Output variables for a function ("DUT") generated using HDL Coder must have a pre-defined size. The following workaround may hel...

28 days ago | 0

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Can I optimize buffer usage in generated code for input and output arguments of a subsystem with Embedded Coder R2024a?
As of MATLAB R2024b, this is not possible for a subsystem.  The development team is aware of this limitation and will consi...

28 days ago | 0

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Why does converting my model into a masked subsystem result in an error indicating a mismatch between the inferred signal size and the size determined by back propagation in MATLAB R2022a?
The issue stems from how Simulink determines signal dimensions within subsystems and masked subsystems. Simulink determines...

28 days ago | 0

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Why do I get "undefined reference" error when trying to generate code that references a C++ function?
Since the definition of the external function is defined in a C++ file, a C++ compiler will be used to build the object for that...

28 days ago | 0

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Why do I get "Access violation reading location 0xFFFFFFFFFFFFFFFF" error while running .NET application which uses .DLL generated by MATLAB Coder R2024a?
The best practice is to use the “emxArray” utility functions to handle pointers, memory, and general handling of arrays instead ...

28 days ago | 0

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How to use the Partial Differential Equation Toolbox for generating and plotting a 2-D plane geometric object in MATLAB, where the domain of interest is the interior of a simple closed curve?
You can use the MATLAB functions “fegeometry” and “pdegplot” for generating and plotting 2-D plane geometric objects using Parti...

28 days ago | 0

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How do I configure temperature-dependent parameters for the “Peltier Device” block in Simscape R2025a?
Unfortunately, the “Peltier Device” block does not have built-in functionality to configure parameters based on temperature. Our...

28 days ago | 0

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How does the "relativeEntropy" function work internally?
The "relativeEntropy" function implements the equation for the one-dimensional case that is below equation (5.14) on page 176 (s...

28 days ago | 0

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Why does the text inside the "Summary" column disappear in the Requirements Editor in R2024b?
You need to click on the "Refresh" button, as shown in Fig. 9 below. Then, the text in the "Summary" column will appear, as show...

28 days ago | 0

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How can I edit the properties for multiple requirements in the Requirements Editor in MATLAB R2024b?
It is not currently possible to batch edit the properties of multiple requirements using the Requirements Editor. As a workaroun...

28 days ago | 0

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How to troubleshoot Simscape error "Nonlinear solver: failed to converge, residual norm too large."?
The error is saying that Simscape is incapable of solving your system. This can occur for a variety of reasons; however, most of...

28 days ago | 0

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Why do I see an error, "failed to load HTTP resource", when I publish a script as a PDF in MATLAB R2024a and R2023b?
When using MATLAB R2023b and R2024a, you might encounter a sporadic error when publishing a MATLAB script as a PDF document by u...

28 days ago | 1

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How can I tilt or rotate the reflector in a reflector cross-dipole (turnstile) antenna in R2024b?
Yes, it is possible to tilt the reflector and not the exciter. However, custom 3D geometry workflows will be required. The code ...

28 days ago | 0

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Question

How can I tilt or rotate the reflector in a reflector cross-dipole (turnstile) antenna in R2024b?
 In R2024b, I'm trying to rotate the reflector in a reflector cross-dipole (turnstile) antenna using the following code: c...

28 days ago | 1 answer | 0

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Why do I get an error saying "No data for report generation" when I try to generate test reports in a "parfor" loop in MATLAB R2023b?
As of MATLAB R2023b, generating report in parallel is a limitation in Simulink Test Report Generation. However, it is possible ...

28 days ago | 0

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How do I resolve the code replacement library error: "incompatible with hardware implementation" when building a TI C2000 model?
This is expected behavior when the option "ProdEqTarget" (Configuration Parameters > Hardware Implementation > Advanced pa...

28 days ago | 0

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How can I resolve the "malformed URL" error when clicking "pull / push" in the "Source Control" tab in MATLAB R2021a?
As of R2021a, we use a different library for Git. Its behavior matches command-line Git more closely and it will look up environ...

28 days ago | 0

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Why am I getting a "Unmatched parameter name" error when trying to connect to a database using the "database" command in MATLAB R2024b?
This issue can occur when the database name "database_name" already exists as a Data Source in MATLAB. To verify this, run the f...

28 days ago | 0

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How do I build my model containing a C-MEX S-function if I don't have the S-function C source file using Simulink Coder?
You can build the model even though you do not have the source file for the S-function. Please refer to the information below. T...

28 days ago | 0

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How to scale the output of the 'spectrogram' function to obtain matching amplitude of the original signal
The magnitudes do not match because of two reasons. First, the default window in spectrogram is a Hamming window of the specifie...

28 days ago | 0

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Why is the step-size in exported waveforms from Signal Integrity Viewer not fixed, and how to fix it?
The Signal Integrity Viewer is resampling the data, and I suspect that you're simply seeing numeric inaccuracies due to the very...

28 days ago | 0

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How can I log signals in the lower levels of my model from the top level in R2021a?
Signal logging can be turned on or off from the top-level model using the Signal Table for the top-level model. This is shown in...

28 days ago | 0

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Why do I see a jump/pulse in a bathtub plot in SerDes Designer?
In SerDes Designer, when a bathtub plot is created, both the Data bathtub and the Clock PDF are plotted. The left and right curv...

28 days ago | 0

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Why do I receive the error message: "Invalid size of channel dimension" when using the "trainnet" function in MATLAB R2024a?
This issue occurs when either the size of the "trainingData" or the size of the "validationData" does not match the number of fe...

28 days ago | 0

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Why do I get the error message 'Dot indexing is not supported for variables of this type.' when performing range analysis while generating fixed-point code in MATLAB R2025a?
The issue is happening because of use of a struct whose fields are not used for any computation. Fixed-Point Converter is lookin...

28 days ago | 0

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