Kolben Games Crash Log V 2.4
Pokémon 3D has crashed!
// Blame Darkfire.

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Game information:

Pokémon 3D Indev version: 0.53 (87)
Content Packs: {Emerald Texture Pack,HGSS Music Pack HD}
Active GameMode: Pokemon 3D
GameJolt Account: TRUE (83266)
Playing on Servers: FALSE
Game Environment: SaveScreen
Actionscript: No script running
File Validation: True
Sandboxmode: False

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Screen state for the current screen (SaveScreen)

Screen state not implemented for screen class: SaveScreen

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System specifications:

Operating system: Microsoft Windows 7 Home Premium  [6.1.7601.65536]
Core architecture: 32 Bit
System time: 3/20/2015 2:07:04 PM
System language: English (United States)(ENU) / Loaded game language: en
Decimal separator: .
Available physical memory: 3.43 Gigabyte
Available logical processors: 4

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.Net installation information:

v2.0.50727  2.0.50727.5420  SP2
v3.0  3.0.30729.5420  SP2
v3.5  3.5.30729.5420  SP1
v4  
  Client  4.0.30319

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Graphics Card information:

[CardName(s): "Intel(R) HD Graphics"]
[CardRAM(s) : "1605296128"]

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Error information:

Message: Collection was modified; enumeration operation may not execute.
InnerException: NOTHING
BaseException: Collection was modified; enumeration operation may not execute.
HelpLink: No helplink available.
Data: Items: 0
Source: mscorlib
Win32 Errorcode: -1

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Error solution:
(The provided solution might not work for your problem)

Error ID: -1
Error Type: NaN
Error Description: The error is undocumented in the error handling system.
Error Solution: NaN

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CallStack: 

   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
   at System.Collections.Generic.List`1.Enumerator.MoveNext()
   at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
   at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source)
   at net.Pokemon3D.Game.GameJolt.GamejoltSave.get_DownloadProgress()
   at net.Pokemon3D.Game.GameJolt.GamejoltSave.get_DownloadFinished()
   at net.Pokemon3D.Game.SaveGameHelpers.get_GameJoltSaveDone()
   at net.Pokemon3D.Game.SaveScreen.Update()
   at net.Pokemon3D.Game.Core.Update(GameTime gameTime)
   at net.Pokemon3D.Game.GameController.Update(GameTime gameTime)
   at Microsoft.Xna.Framework.Game.Tick()
   at Microsoft.Xna.Framework.Game.HostIdle(Object sender, EventArgs e)
   at Microsoft.Xna.Framework.GameHost.OnIdle()
   at Microsoft.Xna.Framework.WindowsGameHost.RunOneFrame()
   at Microsoft.Xna.Framework.WindowsGameHost.ApplicationIdle(Object sender, EventArgs e)
   at System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FDoIdle(Int32 grfidlef)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Microsoft.Xna.Framework.WindowsGameHost.Run()
   at Microsoft.Xna.Framework.Game.RunGame(Boolean useBlockingRun)
   at Microsoft.Xna.Framework.Game.Run()
   at net.Pokemon3D.Game.Program.Main(String[] args)

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Enviornment dump: 

   Private ready As Boolean = False
   Private delay As Single = 15
   Private mainTexture As Texture2D = Microsoft.Xna.Framework.Graphics.Texture2D
   Private savingStarted As Boolean = True
   Private saveSessionFailed As Boolean = False
   Private backupFileLocation As String = 
   Public UpdateFadeOut As Boolean = False
   Public UpdateFadeIn As Boolean = False

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You should report this error.

Go to "http://pokemon3d.net/forum/forums/6/create-thread" to report this crash there.