This is a current limitation of the underlying code generation functionality. Runtime indexing into a heterogeneous cell array is not supported as mentioned in the documentation below:
To work around this, create a local copy of the 'cellArray' variable as shown in the code below:
function [out] = fcn(idx, cellArray)
c = cellArray;
out = string(c{idx});
end
The function input cannot be changed from heterogeneous to homogeneous, while the local copy can.
The "loadStringsFromCellArray.zip" file attached above contains the example and solution.
