# Problem switching / restarting scene **URL:** \ **Category:** Phaser 3\ **Created:** [January 20, 2019, 12:16pm UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844 "2019-01-20T12:16:23Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![paulbonneau](https://avatars.discourse-cdn.com/v4/letter/p/e68b1a/32.png) [@paulbonneau](https://phaser.discourse.group/u/paulbonneau)\ **Post date:** [January 20, 2019, 12:16pm UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/1 "2019-01-20T12:16:23Z")
Hi everyone ! I experiment a strange problem, when I try to transition to another scene using this.scene.start(‘nameOfTheScene’); I get a black screen without the text contained into this scene. Also, if I try a this.scene.restart() I have the following errors : TypeError: this.frame.source is null TypeError: this.source is null Does someone already experiments problems like this ? the pen ([https://codepen.io/paulbonneau/pen/OrKgvR](https://codepen.io/paulbonneau/pen/OrKgvR)) I use matter.js as physics engine for the record ---
**Author:** ![prob](https://yyz2.discourse-cdn.com/free1/user_avatar/phaser.discourse.group/prob/32/628_2.png) [@prob](https://phaser.discourse.group/u/prob)\ **Post date:** [January 20, 2019, 2:03pm UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/2 "2019-01-20T14:03:36Z")
From a quick glance, it looks like your scene keys don’t match. You might also want to log out your scene list order. ---
**Author:** ![paulbonneau](https://avatars.discourse-cdn.com/v4/letter/p/e68b1a/32.png) [@paulbonneau](https://phaser.discourse.group/u/paulbonneau)\ **Post date:** [January 20, 2019, 2:18pm UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/3 "2019-01-20T14:18:52Z")
Even when I’ve got the exact same string for the key i call in my transition / switch. I get a black screen. I also tried to match the key name with the “Class” name of my scene but it doesn’t solve the problem. How the scene order could affect scene called with keys ? I tried to modify the order but it doesn’t change the behavior. ---
**Author:** ![samme](https://yyz2.discourse-cdn.com/free1/user_avatar/phaser.discourse.group/samme/32/5275_2.png) [@samme](https://phaser.discourse.group/u/samme)\ **Post date:** [January 20, 2019, 5:59pm UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/4 "2019-01-20T17:59:38Z")
https://codepen.io/samme/embed/preview/aPeggM?height=300&slug-hash=aPeggM&default-tabs=js,result&host=https://codepen.io ---
**Author:** ![paulbonneau](https://avatars.discourse-cdn.com/v4/letter/p/e68b1a/32.png) [@paulbonneau](https://phaser.discourse.group/u/paulbonneau)\ **Post date:** [January 26, 2019, 10:12am UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/5 "2019-01-26T10:12:51Z")
Hi ! Thank you very much for your correction. If I understand it correctly, the problem was that I didn’t used a capital S for Phaser.Scene in my scene declaration. And thanks for the debug method of scene, I didn’t find the way to debug efficiently in Phaser 3: callbacks: { postBoot: function (game) { game.scene.dump(); } } A last question. When I try to restart my first scene (the one where the game is) I get the following error : TypeError: this.frame.source is null TypeError: this.source is null Do you know where could it come from or at least how I could debug this one ? ---
**Author:** ![digitsensitive](https://yyz2.discourse-cdn.com/free1/user_avatar/phaser.discourse.group/digitsensitive/32/349_2.png) [@digitsensitive](https://phaser.discourse.group/u/digitsensitive)\ **Post date:** [January 26, 2019, 10:42am UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/6 "2019-01-26T10:42:27Z")
Have a look at the following two World Issues about scenes. This might help you to understand the concepts behind scenes. - [Phaser World Issue 120](https://madmimi.com/p/2c1afb) - [Phaser World Issue 121](https://madmimi.com/p/860f1c) ---
**Author:** ![samme](https://yyz2.discourse-cdn.com/free1/user_avatar/phaser.discourse.group/samme/32/5275_2.png) [@samme](https://phaser.discourse.group/u/samme)\ **Post date:** [January 27, 2019, 2:56am UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/7 "2019-01-27T02:56:16Z")
> [@paulbonneau](#): > > When I try to restart my first scene (the one where the game is) I get the following error That’s happening because the destroyed text object is still receiving the scene’s `addScore` event and trying to draw. Do something like: ``` this.events.off('addScore'); this.scene.restart(); ``` Scene event listeners aren’t cleared when the scene is shutdown (stopped, restarted). It’s a tricky point. ---
**Author:** ![psymeons](https://yyz2.discourse-cdn.com/free1/user_avatar/phaser.discourse.group/psymeons/32/4732_2.png) [@psymeons](https://phaser.discourse.group/u/psymeons)\ **Post date:** [January 29, 2021, 9:17am UTC](https://phaser.discourse.group/t/problem-switching-restarting-scene/844/8 "2021-01-29T09:17:25Z")
I know this is an old post, but you just saved my day. Thanks a lot for this reply!