See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.   ************** Exception Text ************** System.ArgumentOutOfRangeException: Length cannot be less than zero. Parameter name: length    at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)    at System.String.Substring(Int32 startIndex, Int32 length)    at FFsplit.Classes.TcpRelay..ctor(String url, Int32 multiplier)    at FFsplit.Classes.Session.ConfigureFFmpegArgs()    at FFsplit.Classes.Session.Start()    at FFsplit.Forms.MainForm.StartSession()    at FFsplit.Forms.MainForm.StartButton_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)     ************** Loaded Assemblies ************** mscorlib     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll ---------------------------------------- FFsplit     Assembly Version: 0.7.0.23     Win32 Version: 0.7.0.23     CodeBase: file:///C:/Program%20Files%20(x86)/FFsplit/FFsplit.exe ---------------------------------------- System.Windows.Forms     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System.Drawing     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- System     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Web.Extensions     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Web.Extensions/v4.0_4.0.0.0__31bf3856ad364e35/System.Web.Extensions.dll ---------------------------------------- System.Web     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Web/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Web.dll ---------------------------------------- System.Core     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll ---------------------------------------- System.Configuration     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll ---------------------------------------- System.Xml     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll ---------------------------------------- Microsoft.GeneratedCode     Assembly Version: 1.0.0.0     Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll ----------------------------------------   ************** JIT Debugging ************** To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled.   For example:         When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.