title: LibGdx Assetmanager loading invalid line
body: <p>When I try to load my TextureAtlas through the AssetManager, it throws the following exception:</p>
  
  <pre><code>Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: com.badlogic.gdx.utils.GdxRuntimeException: Error reading pack file: data/atlas/mainmenu
  at com.badlogic.gdx.assets.AssetManager.handleTaskError(AssetManager.java:517)
  at com.badlogic.gdx.assets.AssetManager.update(AssetManager.java:351)
  at com.badlogic.gdx.assets.AssetManager.finishLoading(AssetManager.java:372)
  at nl.gameplayinc.tubularballs.util.Assets.load(Assets.java:31)
  at nl.gameplayinc.tubularballs.util.Assets.create(Assets.java:24)
  at nl.gameplayinc.tubularballs.screen.SplashScreen.show(SplashScreen.java:28)
  at com.badlogic.gdx.Game.setScreen(Game.java:62)
  at nl.gameplayinc.tubularballs.TubularBalls.setScreen(TubularBalls.java:70)
  at nl.gameplayinc.tubularballs.TubularBalls.create(TubularBalls.java:27)
  at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:136)
  at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:114)
  Caused by: com.badlogic.gdx.utils.GdxRuntimeException: Error reading pack file: data/atlas/mainmenu
  at com.badlogic.gdx.graphics.g2d.TextureAtlas$TextureAtlasData.&lt;init&gt;(TextureAtlas.java:177)
  at com.badlogic.gdx.assets.loaders.TextureAtlasLoader.getDependencies(TextureAtlasLoader.java:58)
  at com.badlogic.gdx.assets.loaders.TextureAtlasLoader.getDependencies(TextureAtlasLoader.java:34)
  at com.badlogic.gdx.assets.AssetLoadingTask.handleSyncLoader(AssetLoadingTask.java:98)
  at com.badlogic.gdx.assets.AssetLoadingTask.update(AssetLoadingTask.java:87)
  at com.badlogic.gdx.assets.AssetManager.updateTask(AssetManager.java:454)
  at com.badlogic.gdx.assets.AssetManager.update(AssetManager.java:349)
  ... 9 more
  Caused by: com.badlogic.gdx.utils.GdxRuntimeException: Invalid line: mainmenu.png
  at com.badlogic.gdx.graphics.g2d.TextureAtlas.readValue(TextureAtlas.java:425)
  at com.badlogic.gdx.graphics.g2d.TextureAtlas$TextureAtlasData.&lt;init&gt;(TextureAtlas.java:110)
  ... 15 more
  </code></pre>
  
  <p>When I load my atlas normally 
  (using: <code>new TextureAtlas("data/atlas/mainmenu/mainmenu.atlas"</code>);) it works just fine. I need the assetmanager to load my files through the resolutionfileresolver so I made the following setup:</p>
  
  <pre><code>public void create()
  {
      Resolution _568x1136 = new Resolution(568, 1136, ".568x1136");
  
      ResolutionFileResolver resolver = new ResolutionFileResolver(new InternalFileHandleResolver(), _568x1136);
  
      manager = new AssetManager();
      manager.setLoader(TextureAtlas.class, new TextureAtlasLoader(resolver));
      load();
  }
  
  private void load()
  {
      manager.load("data/atlas/mainmenu", TextureAtlas.class);
      manager.finishLoading();
  }
  </code></pre>
  
  <p>The exception occurs on <code>manager.load("data/atlas/mainmenu", TextureAtlas.class);</code></p>
  
  <p>My .atlas file is located at assets\data\atlas\mainmenu\mainmenu.atlas
  The png it points to at the first line is mainmenu.png which is located in the same directory and since it can find a line with 'mainmenu.png' i assume that it also found the correct atlas file.</p>
  
  <p>I tried adding the resolution extensions as well (mainmenu.atlas.568x1136 and mainmenu.png.568x1136) but with the same result.</p>
  
  <p>I have searched a lot of places for help but can't seem to find my problem anywhere.</p>
  
  <p>If someone could help me I would really appreciate it!</p>
  
  <p>Also, I can't seem to find a lot of information on the ResolutionFileResolver. What files should have the resolution extension (i gave it to both my atlas and img file) and is there an easier way to generate the resolution resources than manually adding the extension?</p>
  
  <p><strong>EDIT</strong> Added the mainmenu.atlas</p>
  
  <pre><code>mainmenu.png
  format: RGBA8888
  filter: Nearest,Nearest
  repeat: none
  background
  rotate: false
  xy: 2, 617
  size: 640, 1136
  orig: 640, 1136
  offset: 0, 0
  index: -1
  btnbuy
  rotate: false
  xy: 2, 537
  size: 414, 78
  orig: 414, 78
  offset: 0, 0
  index: -1
  btncredits
  rotate: false
  xy: 2, 457
  size: 414, 78
  orig: 414, 78
  offset: 0, 0
  index: -1
  btnhighscores
  rotate: false
  xy: 2, 58
  size: 414, 77
  orig: 414, 77
  offset: 0, 0
  index: -1
  btninfo
  rotate: false
  xy: 2, 377
  size: 414, 78
  orig: 414, 78
  offset: 0, 0
  index: -1
  btnmute
  rotate: false
  xy: 418, 537
  size: 94, 78
  orig: 94, 78
  offset: 0, 0
  index: -1
  btnnewgame
  rotate: false
  xy: 2, 297
  size: 414, 78
  orig: 414, 78
  offset: 0, 0
  index: -1
  btnrate
  rotate: false
  xy: 755, 1329
  size: 58, 424
  orig: 58, 424
  offset: 0, 0
  index: -1
  btnresumegame
  rotate: false
  xy: 2, 217
  size: 414, 78
  orig: 414, 78
  offset: 0, 0
  index: -1
  btntutorial
  rotate: false
  xy: 2, 137
  size: 414, 78
  orig: 414, 78
  offset: 0, 0
  index: -1
  btnunmute
  rotate: false
  xy: 815, 1675
  size: 94, 78
  orig: 94, 78
  offset: 0, 0
  index: -1
  display
  rotate: false
  xy: 2, 2
  size: 343, 54
  orig: 343, 54
  offset: 0, 0
  index: -1
  longtube
  rotate: false
  xy: 644, 617
  size: 109, 1136
  orig: 109, 1136
  offset: 0, 0
  index: -1
  </code></pre>