Simulation Issues & Tips

Loading Simulation Difficulties

There are many factors that can lead to loading issues in the simulations like

  • outdated browsers,

  • running out of RAM space,

  • or anti-virus blocking the simulation itself.

So, it is important to identify what's most like is the root cause of the loading difficulty.

Loading Time  

Depending on your computer and internet speeds, the simulation might take up to five minutes to load.

The simulation may pause several times during the loading process at 0%, 25%, or 99%. This is normal. Please wait a few seconds and the loading will continue.

It is important that you stay on the loading tab, as switching tabs might pause the loading process.

Loading stuck for more than 5 minutes at the same progress

Lack of free memory (RAM space) is usually the issue.

  • Close all browser windows to clear your computer memory,

  • Clear your browser cache & cookies or switch between our 2 supported browsers Chrome <> Firefox,

  • Restart your laptop,

  • Then refresh the simulation window to load Labster again with sufficient free memory.

Help depending on the loading progress

  1. Loading stuck at 0%: Our simulations are meant to open in a new tab and load in full screen. Restart your laptop, or close all browser windows to clear your computer memory.

  2. Loading stuck at 22-25%: Please wait. Keep the tab open and visible to not pause loading. It can take up to 5 minutes.

  3. Loading error at 25%: If you see an error message at 25% progress, please see this guide on how to prevent anti-virus tools from blocking Labster.

  4. Loading stuck at 100%: Almost there. Just wait a bit. In most cases, it will take 5-10 seconds, but on older laptops, it can take up to 2 minutes when doing the final preparation of the 3D lab for you.

Note: If you're using Chromebook, it is best to use the native app to get the best performance. You can check this article to know more:

If you are still experiencing an issue, please check our minimum requirements and make sure your OS is up to date. Please also run a Speed Test and share the results with our Support team.

Start button unresponsive

In case of nothing happening when pressing the "Start" button, please check out this article:


If after more than a reasonable time of waiting the simulation does not finish loading, please check our Basic Troubleshooting guide:

Please do not hesitate to reach out to our support team if you have any questions or are in need of assistance.