COMSOL 6.4 - Debugging

In the ribbon, the and sections contain the tools available for debugging methods.

For debugging purposes, click in the gray column to the left of the code line numbers to set breakpoints, as shown in the figure below.

When you run the application, the method will stop at the breakpoints. Click the button in the ribbon to go to the next line in the method. The figure above shows a method currently stopped at the line highlighted in yellow. The window, seen to the right in the figure above, opens when a method is paused at a breakpoint. Using the window, you review and modify local variables, declarations, and parameters, while debugging.

The window, below the method window, as seen in the figure above, also opens when a method is paused at a breakpoint. You can select a method in the call stack see the corresponding variables in the window.

Click to run the method up until the next breakpoint. Click to stop running the method and exit. You can also stop the execution of a method while testing an application by using the keyboard shortcut Ctrl+Pause. A dialog appears, as shown below.

Click to suspend method execution at the next reached line in method code, as if there had been a breakpoint there. Click to step into the next method, if possible. The option continues until the current method returns. Use to remove all breakpoints. Instead of removing, you can disable all breakpoints by clicking .

To get an overview of all breakpoints, you can open the window, as seen in the figure below. To open this window, click the corresponding button in the tab, in the ribbon section .

You can enable and disable individual breakpoints, either from the window or by right-clicking a breakpoint in the gray column to the left of the code line numbers, as shown below.

Click the to display customized debugging messages in a separate window, as shown in the figure below.

The example above illustrate that, as an alternative to using the window, you can use the debugLog command a to display the values of variables in the window. The code below uses the debugLog command to display the values of strings and components of a 1D double array.

Note that you can also use the Java Shell and Chatbot windows while debugging. For more information on these tools as well as built-in methods for debugging, see Debug Methods and the Application Programming Guide.

From COMSOL version 6.4 onward, any output produced by System.out or System.err in method code will be displayed in the window, for example: