MATLAB Runtime Server

Trapping Errors

Error trapping helps suppress command-window output and helps your Runtime Server application run more smoothly. It also allows you to design user-friendly features such as context-sensitive error dialog boxes. Wherever the application executes a MATLAB command that could potentially generate an error, use a try-catch-end structure.

In a try-catch-end structure (below), the try block contains the MATLAB commands that you want the application to evaluate and execute (expression1 and expression2). If the try block executes successfully, then the catch block is ignored. If the try block generates an error during execution, then the catch block (expression3 and expression4) is executed in its place, and the error is suppressed. Use the lasterr command to find out what the error was.

• try
     expression1;
     expression2;
  catch
     expression3;
     expression4;
  end
  

Tip    Even if you avoid using the error command, you might invoke MATLAB functions that use it. Therefore, you should use these error trapping techniques at a high structural level in your application so that the application can trap all errors and handle them in an appropriate way.

Using a Uicontrol or Uimenu to Exit the Application

Setting the Global Error Behavior on a PC