How to Stop Matlab from Running Infinite Loops - Comprehensive Guide

Are you facing inexplicably long running times in Matlab? Does your script seem to be stuck in an infinite loop? While Matlab is an indispensible tool for many types of computing tasks, debugging an infinite loop can be a bit tricky.

This quick guide will provide you with the necessary steps you need to take in order to stop Matlab from running an infinite loop. Additionally, we have also included an FAQ section at the end of this guide which should help you address any additional questions or doubts you may have.

Use the dbstop Command

The most efficient and straightforward method of debugging an infinite loop in Matlab is by using the built-in dbstop command. The dbstop command helps in halts the program from running when any error or pause occurs.

The syntax for the command is:

dbstop if error

By using this command, Matlab will break into debug mode whenever any execution error is encountered. This will help you in quickly spotting the source of the infinite loop and can make debugging operations simpler.

Use the find_system command

Another technique you can use when you want to debug infinite loops in Matlab is by using the find_system command. This command helps in locating infinite loops which may be present in a particular block of code or script.

To use this command, input your code into the system using the command line interface, which should look like this:

find_system('Name', 'My_System', 'FindAll', 'On')

Once you input the code, execute it and the system will then show you the blocks which contain any infinite loops. You can then take the necessary steps in order to debug your code and make any necessary changes in order to avoid any infinite loops.

Use the slVerify command

The slVerify command is another valuable tool for debugging infinite loops in Matlab. This command helps in identifying any dormant and active signals within the code.

It can also be used to identify signals which may be stuck in an infinite loop. The syntax of the command is as follows:

slVerify(sys,'AllTestedReqs', 1)

Using this command helps in quickly locating the source of the infinite loop and allows you to take the necessary steps to debug your code.


What is an infinite loop in Matlab?

An infinite loop in Matlab is a programming loop which continuously runs without stopping, thus preventing your computer from carrying out any other tasks. This can cause your computer to become unresponsive and your program to become inefficient.

How can I debug an infinite loop?

The most efficient way to debug an infinite loop is by using the built-in commands like dbstop, find_system, and slVerify. Additionally, you can also opt for advanced debugging techniques such as inserting breakpoints into your code and examining the state of different elements within the code.

Why is it essential to debug an infinite loop?

Debugging an infinite loop is essential because it helps you identify the source of the loop and resolve the issue, thus allowing you to improve the overall efficiency and performance of your program. Additionally, it also helps in avoiding any further issues in the future.

What other debugging techniques can I use?

Apart from the commands mentioned above, you can also use other debugging techniques such as setting breakpoints, examining elements within the code, and running the code multiple times until you find the source of the infinite loop.

What do I need to do after identifying the source of the infinite loop?

Once you have identified the source of the infinite loop, you can then take the necessary steps in order to fix it and break out of the loop. You can do this by making the necessary changes to your code and identifying any inefficient elements that may be causing the loop.


Debugging infinite loops in Matlab can be a complicated and intimidating task. However, by using the right tools and commands, it can be made much easier. This guide provides you with a few simple but effective ways on how you can quickly identify and stop an infinite loop. We hope this guide helps you. Happy debugging!

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