UNABLE TO LOAD A MESSAGE CATALOG

Hello Mathworks,

We have some trouble with the utilisation of the function FZERO in MATlab 2018b. We are looking for the meaning of the code below :

if nargin == 0
    error(message('MATLAB:fzero:NotEnoughInputs'))
end

The error message that shows :

Error using error 
Unable to load a message catalog 'MATLAB:fzero'. Please check the file location and format.

We try to understand the script 'MATLAB:fzero:NotEnoughInputs' and why this error message appears. Indeed it works in MATlab 2013.

We will appreciate any help you can give.

Answer 1

[Steven Lord]

That is not the line as it appears in the fzero.m file that is included in MATLAB in release R2018b. You've modified that command, or you're trying to use the version of fzero from an older release in a newer release. The fzero function was modified between release R2013a and release R2018b so that's not going to work. Use the version of the fzero function included in your installation of release R2018b.

[tl31]

First of all, thank you for this quick answer. We are working on it.

Moreover, we have several questions (general) due to your answer.

To explain you the context of this command, we are currently working on a project which need the using of the FZERO function. We are using nargin and try to display an error message if the condition in nargin is not completed.

What is the meaning of this line : 'MATLAB:fzero:NotEnoughInputs' particurlarly 'MATLAB:fzero:'

Do you have an idea about what the MATLAB catalog is ?

We hope to hear from you soon to continue this interesting conversation.

[Walter Roberson]

That character vector is used to look up the error message in the user's interface language, such as English or Japanese. The MATLAB:fzero part of it says that error message is to be found in the message file whose name begins with fzero in a directory named MATLAB.

That error message is produced when fzero is called without any parameters, such as

result = fzero()