MATLAB: Do I get an error when converting the MATLAB code (which utilizes “bwlabel”) to C code using MATLAB Coder

Question

I am trying to generate C/C++ code from my MATLAB program, which utilizes "bwlabel".

However, I encounter the following error message:

??? Computed maximum size of output #1 of function 'intermediateLabelRuns' is not bounded.

Static memory allocation requires all sizes to be bounded.

The computed size is [:? x 1].

Please consider enabling dynamic memory allocation to allow unbounded sizes.

Here is an excerpt of my example code:

im_bin = zeros(dim_X,dim_Y); 
coder.varsize('im_bin'); 
for idx=1:dim_X 
    for idy = 1:dim_Y 
        if (im(idx,idy) < threshold) 
            im_bin(idx,idy) = 0; 
        else 
            im_bin(idx,idy) = 1; 
        end 
    end 
end 
[label, nblabel] = bwlabel(im_bin, 4);

Answer 1

A possible cause of this error message Dynamic Memory Allocation During Code Generation is disabled. Please check the coder configuration to see if something similar to the following segment exists:

cfg = coder.config();
cfg.DynamicMemoryAllocation = 'Off';
codegen -config cfg ...

Replacing "Off" with one of the other choices for "DynamicMemoryAllocation" will avoid the issue.