Customer dual monitor is working in some machine and not working in some other

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C#

Hi,

I have done an integration of a secondary monitor to a point of sale system which is having a background video playing part as well. The video is running properly in some machines. But, for few machines its not working at all. It's throwing the below error.

2015-11-30 16:39:51,811 [1] FATAL - An error has occurred in the system.
System.IO.FileNotFoundException: Could not load file or assembly 'Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
File name: 'Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
   at ......PosApp.UI.Windows.WindowsMediaPlayerForm.InitializeComponent()
   at ......PosApp.UI.Windows.WindowsMediaPlayerForm..ctor()
   at ......PosApp.UI.Windows.LogOnForm.LogOnForm_Load(Object sender, EventArgs e)
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at ......PosApp.UI.Windows.WindowsForm`2.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  C:\Program Files (x86)\....\..... POS\......PosApp.UI.Windows.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = MYPC\MyUser
LOG: DisplayName = Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
 (Fully-specified)
LOG: Appbase = file:///C:/Program Files (x86)/.../..... POS/
LOG: Initial PrivatePath = NULL
Calling assembly : AxInterop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Program Files (x86)\....\..... POS\......PosApp.UI.Windows.exe.Config
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Program Files (x86)/..../..... POS/Interop.WMPLib.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/..../..... POS/Interop.WMPLib/Interop.WMPLib.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/..../..... POS/Interop.WMPLib.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/..../..... POS/Interop.WMPLib/Interop.WMPLib.EXE.

2015-11-30 16:40:11,715 [1] FATAL - An error has occurred in the system.
System.NullReferenceException: Object reference not set to an instance of an object.
   at ......PosApp.UI.Windows.LogOnForm.CancelActionButton_Click(Object sender, EventArgs e)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

I tried the following to fix this, but still I'm getting this error.

First, I copied the AxInterop.WMPLib.dll to the GAC folder.
Then checked the dotNet version and updated all the machines with the same version.
Then I went through several websites to find a solution for this issue. Still, I couldn't sort it out. I've spent more than two days to find a solution.


Did anyone came across this issue? Any solutions for this? Help me on this.

Thanks in advance.