Your Python simulation fails to start - AWS SimSpace Weaver

End of support notice: On May 20, 2026, AWS will end support for AWS SimSpace Weaver. After May 20, 2026, you will no longer be able to access the SimSpace Weaver console or SimSpace Weaver resources. For more information, see AWS SimSpace Weaver end of support.

Your Python simulation fails to start

You might see an Unable to start app error in your simulation's management log. This can happen if your custom container creation failed. For more information, see Failure during custom container creation. For more information about logs, see SimSpace Weaver logs in Amazon CloudWatch Logs.

If you're sure that there's nothing wrong with your container, check your app's Python source code. You can use SimSpace Weaver Local to test your app. For more information, see Local development in SimSpace Weaver.