[Nexus 5 Q&A, Help & Troubleshooting] YourTheBest:
I'm almost far.

I get this error when I press connect in the Qualcom EV tools see 4.30

What can I do?

This is the log.

See the end of this message for details on invoking

just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************

System.NullReferenceException: Object reference not set to an instance of an object.

at EFS_Professional.frmQualcommNVTools.ConnectToCOMPort()

at EFS_Professional.frmQualcommNVTools.btnConnect_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: 4.0.30319.34014 built by: FX45W81RTMGDR

CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll

----------------------------------------

EFS Professional

Assembly Version: 2.1.80.0

Win32 Version: 2.1.80.0

CodeBase: file:///C:/Users/admin/Desktop/EFS%20Professional/EFS%20Professional.exe

----------------------------------------

Microsoft.VisualBasic

Assembly Version: 10.0.0.0

Win32 Version: 12.0.20806.33440 built by: FX45W81RTMREL

CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualBasic/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll

----------------------------------------

System

Assembly Version: 4.0.0.0

Win32 Version: 4.0.30319.34239 built by: FX452RTMGDR

CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll

----------------------------------------

System.Core

Assembly Version: 4.0.0.0

Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL

CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll

----------------------------------------

System.Windows.Forms

Assembly Version: 4.0.0.0

Win32 Version: 4.0.30319.34250 built by: FX452RTMGDR

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: 4.0.30319.33440 built by: FX45W81RTMREL

CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll

----------------------------------------

System.Runtime.Remoting

Assembly Version: 4.0.0.0

Win32 Version: 4.0.30319.34243 built by: FX452RTMGDR

CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Runtime.Remoting/v4.0_4.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll

----------------------------------------

System.Configuration

Assembly Version: 4.0.0.0

Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL

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: 4.0.30319.34230 built by: FX452RTMGDR

CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll

----------------------------------------

System.Management

Assembly Version: 4.0.0.0

Win32 Version: 4.0.30319.33440 built by: FX45W81RTMREL

CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Management/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Management.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:

<configuration>

<system.windows.forms jitDebugging="true" />

</configuration>

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.