Narginchk has the same name as a MATLAB built-in function

1

The function narginchk has the same name as a MATLAB built-in function. It is recommended that you rename the function to avoid potential name conflicts

which -all narginchk
D:\Program Files (x86)\cvx-w64\cvx\lib\narginchk_\narginchk.m
built-in (D:\Program Files (x86)\Matlab2020a\toolbox\matlab\lang\narginchk) % Shadowed

2

There are existing topics on this matter.

https://ask.cvxr.com/search?q=narginchk

In particular, see the posts by CVX developer @mcg in this this somewhat old topic MATLAB nargchk deprecated