The argument category must be 'required', 'optional', 'repeating', 'namevalue', or 'unspecified'. Function identifier must be a character vector or a string scalar. ''{0}'' is not a class and cannot be used to find methods. Make sure the class name is spelled correctly. ''{0}'' is not a MATLAB file and cannot be used to find local functions. Make sure the name is spelled correctly. Cannot find function or class ''{0}''. Make sure the name is spelled correctly. If you look for method, please use format classname/methodname. For example, you can find plus method in string class using string/plus. Cannot find method ''{0}'' in class ''{1}''. Make sure the method name is spelled correctly. Unsupported function type. Function ''{0}'' doesn't define local function ''{1}''. Make sure the function name is spelled correctly. ''{0}'' is not a valid function identifier.