Why won't my code work in R2015b?

I created a GUI in MATLAB R2013b and it works fine, but when I try and run the same program in R2015b I get errors. What could be some potential problems as to why it won't work?

[Steven Lord]

Can you post the text of the error messages you received? That might help us give more relevant suggestions.

[mlb452]

Well now I'm receiving a different error, after changing nothing.

This is what the current error says:

Error in poly_graph

Error in tf_process_gui/executebutton_Callback

Error while evaluating UIControl Callback

poly_graph is a function referenced in my main .m file. This is the same type of error I was receiving yesterday. It was just referencing a different function.

[mlb452]

Now the original errors are popping back up. They say:

Error using fprintf. Invalid file identifier. Use fopen to generate a valid file identifier

Error while evaluating UIControl Callback.

Again, when I run this with R2013b, I get no errors. So I don't understand why I'm having issues with the fprintf now...

[Steven Lord]

 Error in poly_graph

That's not the whole text of the error message. You posted where the error occurs, but not what error occurred.

 Error using fprintf. Invalid file identifier.
 Use fopen to generate a valid file identifier

You called fopen to create a file identifier that you then passed to fprintf. Call fopen with two outputs. If the first is -1, display the second to learn more information about why fopen was not able to create a valid identifier.

Often this happens because you don't have write permission to the directory in which you're trying to create the file. If you're trying to write to a different directory in the different releases, that could explain why the code fails in one release but not in the other.

Answer 1

[Star Strider]

See the documentation that discusses Graphics Changes in R2014b (link).