There are several steps you can take to identify the features which could result in errors during conversion.
%#codegen and coder.screener (MATLAB Coder)
Add the %#codegen pragma to the top of the MATLAB® file that is being converted to fixed point. Adding this directive
instructs the MATLAB Code Analyzer to help you diagnose and fix violations that would
result in errors during when you try to accelerate or instrument your
code.
The coder.screener (MATLAB Coder) function takes your
function as its input argument and warns you of anything in your code that is
not supported for codegen. Codegen support is essential for minimum and maximum
logging and data type proposals.
Consult the table of supported functions
See Language Support for a table of features supported for code generation and fixed-point conversion.