App crashes every second time

[wakeUpCall]

Hi, my activity always crashes the second time I open my app.
that's what the catlog says:

06-05 18:47:29.209: E/AndroidRuntime(6835): FATAL EXCEPTION: UpdateThread
06-05 18:47:29.209: E/AndroidRuntime(6835): java.lang.IllegalStateException: pEntity '' already has a parent: 'GameScene'. New parent: 'GameScene'!
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.entity.Entity.assertEntityHasNoParent(Entity.java:1412)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.entity.Entity.attachChild(Entity.java:724)
06-05 18:47:29.209: E/AndroidRuntime(6835): at com.go.work.LevelBuilder.attachToScene(LevelBuilder.java:82)
06-05 18:47:29.209: E/AndroidRuntime(6835): at com.go.work.LevelBuilder.build(LevelBuilder.java:53)
06-05 18:47:29.209: E/AndroidRuntime(6835): at com.go.work.GameScene.<init>(GameScene.java:38)
06-05 18:47:29.209: E/AndroidRuntime(6835): at com.go.work.LevelMenuScene.onSceneTouchEvent(LevelMenuScene.java:35)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.entity.scene.Scene.onSceneTouchEvent(Scene.java:388)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.engine.Engine.onTouchScene(Engine.java:452)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.engine.Engine.onTouchEvent(Engine.java:438)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.input.touch.controller.BaseTouchController$TouchEventRunnablePoolItem.run(BaseTouchController.java:102)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.util.adt.pool.RunnablePoolUpdateHandler.onHandlePoolItem(RunnablePoolUpdateHandler.java:54)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.util.adt.pool.RunnablePoolUpdateHandler.onHandlePoolItem(RunnablePoolUpdateHandler.java:1)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.util.adt.pool.PoolUpdateHandler.onUpdate(PoolUpdateHandler.java:88)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.input.touch.controller.BaseTouchController.onUpdate(BaseTouchController.java:62)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.engine.Engine.onUpdate(Engine.java:584)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.engine.Engine.onTickUpdate(Engine.java:548)
06-05 18:47:29.209: E/AndroidRuntime(6835): at org.andengine.engine.Engine$UpdateThread.run(Engine.java:820)

I don't attach anything twice to my GameScene. And as said it just happens every 2nd time.

Every help is appriciated.

[OzLark]

That looks to me like your app hasn't closed off completely - do you need to handle thing differently in onPause() onResume() etc?

[wakeUpCall]

Not yet.
Actually I don't handle anything with onResume() and onPause().

[nazgee]

I am *guessing* that you are using some static shi#
You probably add entities to a static object that keeps living when you "quit" our app. Then you "run" your app again, and reunite with your statics. You once again feed it with entities- and you get the error

I do not like statics. If you like 'em: ou'll have to get used to debugging stuff like that and sth harder ;]

[fatal]

You are attaching stuff in touch event every time, that's why you get the error. You should attach your entity(ies) only 1 time, else you get this error.

nazgee: Static objects are destroyed when the app closing (not onpause, ondestroy). There aren't any problem with statics if you are using them correctly. I prefer static for textureatlases and textureregions cause why am i should load the texture to the memory every time i'm creating the same sprite with the same texture?:)

[wakeUpCall]

Ok thanks.
My problem is that I designed my game to access my main Activity by a static way and it would be a shit load of work to change this.
So what could I do?

[fatal]

Ok thanks.
My problem is that I designed my game to access my main Activity by a static way and it would be a shit load of work to change this.
So what could I do?

And what's the problem with it? I don't understand. I'm attaching stuff in onCreateResources / onPopulateScene.