Error in matlab app with a code

Hello, nice to greet you. I hope you can help me with a problem that I am having and I have not been able to solve it, it is the following: I have a code in matlab that involves the fzero function, when I put numerical values ​​it runs perfectly, but I need to take it to matlab app and when I do not give it numerical values ​​if not the variables (letters) that I have in the application gives me an error and I don't know what else to do to be able to link it and that it can give me values ​​with the numbers that it enters in the application. Thank you so much

Error: Error using fzero>localFirstFcnEval

FZERO cannot continue because user-supplied function_handle ==> g failed with the error below.

Unrecognized function or variable 'Cao'.

Error in fzero (line 305)

fx = localFirstFcnEval(FunFcn,FunFcnIn,x,varargin{:});

Error in Proyectoreciclo (line 2)

xai = fzero(@g, 0)

Answer 1

[Tushar]

Hi,

The error which you are facing usually indicates that MATLAB cannot find a particular variable or MATLAB program file in the current directory or on the search path, in your case 'Cao'.

Possible solutions to this:

• Verify Spelling of Function or Variable Name
• Verify Inputs Correspond to the Function Syntax
• Make Sure Function Name Matches File Name
• Make Sure Necessary Toolbox Is Installed and Correct Version
• Verify Path Used to Access Function Toolbox
• Confirm The License Is Active

You can also have a look at the below mentioned MATLAB answer, to know more about possible reasons / solutions for the error you are facing.

Why do I get the error "Unrecognized function or variable"? - MATLAB Answers - MATLAB Central (mathworks.com)

Hope it helps!!