I am trying to use a button to open another app window but an error keeps popping up

i am trying to create an app that when a button is pressed, opens up a separate app window where the user will then fill in data but when i try this code: open(FILE_NAME) this error:"File or variable name must be a character vector or string scalar" appears

[Cris LaPierre]

How do you create FILE_NAME? What is its value?

[Andrew Cuaki]

i created another .mlapp and tried to open it using the open command, the error pops up and it redirects me but once i go back to the app it proceeds fine. i tried using this: open("FILE_NAME") and it worked with no errors but it redirected me to the editor and when id go back to the app it just terminates.

Answer 1

[David Hill]

Below shows a simple structure for what I think you want to do.

function GUI()
fig = uifigure;
p = uipanel(fig,'Position',[20 20 196 135]);
File = uieditfield(p,'Text','Position',[5 60 190 50],'Value','File Name');
btn = uibutton(p,'Position',[5 5 190 50],'Text','Open','ButtonPushedFcn', @ButtonPushed);

function ButtonPushed(~,~)
  r=readmatrix(File.Value);%not sure what kind of file you are reading/opening
end
end

Answer 2

[Cris LaPierre]

See this page on creating multiwindow apps in App Designer.