This warning tends to appear when there are custom functions that share the same name as built-in MATLAB functions. It can also arise if there are multiple MATLAB installations on the system path, therefore causing duplicate built-in functions with the same name. This can cause warnings, errors, and/or unexpected behaviors in MATLAB.
Please follow the steps listed below to resolve the warning and other potentially related issues:
1. Execute the following command in the MATLAB Command Window. Please note that you need to replace <function_name> with the actual function name displayed in the warning message. The “which -all” command displays the paths to all items on the MATLAB path with that given name.
>> which -all <function_name>
This list should only contain MATLAB built-ins, which can either be marked as “built-in”, or contained in a MATLAB toolbox with a path similar to the following:
C:\Program Files\MATLAB\<matlab_release>\toolbox\<more_path_specifics>\<function_name>.m
2. If there are any custom <function_name> functions, please rename them and restart MATLAB to resolve the warning.
3. If there are <function_name> entries from other versions of MATLAB, please run the following commands in the MATLAB Command Window to restore the search path and rehash the toolbox cache.
>> restoredefaultpath
>> rehash toolboxcache
4. Save the path for future sessions of MATLAB by running the following command in the MATLAB Command Window.
>> savepath
