Sequence contains more than one matching element

[paoloambrosio]

Important

When removing a library (storage folder) from the Steam UI, it is not removed from steamapps\libraryfolder.vdf. Until we understand how Steam determines if a library is active or not, and where that information is stored, there is nothing that can be done to fix this.

On startup, CM display this error:

Sequence contains more than one matching element
   at AMS2CM.GUI.App.ThrowingModManager.FetchState() in D:\a\AMS2CM\AMS2CM\src\GUI\App.xaml.cs:line 72
   at AMS2CM.GUI.MainWindow.SyncModListView() in D:\a\AMS2CM\AMS2CM\src\GUI\MainWindow.xaml.cs:line 74
   at AMS2CM.GUI.MainWindow.Root_Loaded(Object sender, RoutedEventArgs e) in D:\a\AMS2CM\AMS2CM\src\GUI\MainWindow.xaml.cs:line 31
   at WinRT._EventSource_global__Microsoft_UI_Xaml_RoutedEventHandler.EventState.<GetEventInvoke>b__1_0(Object sender, RoutedEventArgs e)
   at ABI.Microsoft.UI.Xaml.RoutedEventHandler.Do_Abi_Invoke(IntPtr thisPtr, IntPtr sender, IntPtr e)

Steps to reproduce the issue:

• On Steam Settings / Storage
  • "Remove Library" where AMS2 is installed
  • Move the SteamLibrary folder to a new location
  • "Add Drive" back, different location ("Choose another location" option)
  • Validate that AMS2 is available on Steam in the new location
• Start CM

Reason for the error is that steamapps\libraryfolder.vdf still contains the old location despite it having been removed!

"libraryfolders"
{
	"0"
	{
		"path"		"C:\\Program Files (x86)\\Steam"
		"label"		""
		"contentid"		"8836340582293123977"
		"totalsize"		"0"
		"update_clean_bytes_tally"		"465057161"
		"time_last_update_corruption"		"0"
		"apps"
		{
			"228980"		"159585466"
		}
	}
	"1"
	{
		"path"		"X:\\SteamLibrary"
		"label"		""
		"contentid"		"1667562575883360818"
		"totalsize"		"470599856128"
		"update_clean_bytes_tally"		"41364098416"
		"time_last_update_corruption"		"1701430242"
		"apps"
		{
			"1066890"		"123720443666"
		}
	}
	"2"
	{
		"path"		"X:\\Games\\SteamLibrary"
		"label"		""
		"contentid"		"1667562575883360818"
		"totalsize"		"470599856128"
		"update_clean_bytes_tally"		"43860647"
		"time_last_update_corruption"		"0"
		"apps"
		{
			"1066890"		"123720443666"
		}
	}
}

Workarounds:

• Remove the incorrect entry from steamapps\libraryfolder.vdf
• Alternatively, configure CM with a fixed game location