Output 'y' has variable size but the upper bound is not specified; explicit upper bound must be provided.

y = 10
coder.varsize('y', [1,20000]);

These lines of code are inside a for loop and I expect the size of the variable y to increase. This is MATLAB function. I get the following error "Output 'y' has variable size but the upper bound is not specified; explicit upper bound must be provided." I have taken a look at other examples but couldn't find a solution to it.

I even checked the box for variable size in ports and data manager of the function.

Please let me know how can I fix this error. Help is appreciated.

[Rishabh Mishra]

Hi,

I have tried reproducing the issue on my system and was unable to find any errors with the code provided by you. Can you provide the complete code?

This would enable me to assist you in a better & efficient manner.

[Tim Gerbert]

Hi,

I have similar problem and checked point 4 in Simulation Target --> Advanced parameters category:

"Make sure that the model is configured for dynamic memory allocation:

• The Dynamic memory allocation in MATLAB functions check box is selected.
• The Dynamic memory allocation threshold in MATLAB functions parameter has the default value 65536."

https://www.mathworks.com/help/simulink/ug/use-dynamic-memory-allocation-for-variable-size-arrays-in-a-matlab-function-block.html

I have attached an example. Can you provide help?

Thanks and Kind Regards

Tim

[Leon]

Hi,

I do also have such problem, but I can't find any solutions.

Have you resolved this issue?