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Error: [System.ArgumentNullException: Value cannot be null] when launching the Exclaimer console

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Exclaimer Support
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Relevant Products: Signature Manager Exchange Edition | Signature Manager Outlook Edition | Mail Archiver

WARNING! The following product was discontinued on 1st April 2021 and is no longer available for purchase or support:

  •  Mail Disclaimers

For more information, please see the Discontinued Questions and Answers page.

WARNING! The following products were discontinued on 30 September 2022:

- Exclaimer Signature Manager Outlook Edition

- Exclaimer Signature Manager Exchange Edition
 

The end of Support for these products is 30th September 2024.

For more information, please see the Discontinued Questions and Answers page.

Scenario

When launching the Exclaimer console, a message similar to this is displayed on the screen:

ERROR: System.ArgumentNullException: Value cannot be null. Parameter name: value at System.Windows.Forms.ImageList.ImageCollection.Add(Image value) at Exclaimer.Console.MMCSnapIn.AddIcon(IconHolder icon) at Exclaimer.Console.Elements.Action.AddIconToSnapIn(IconHolder newIcon)at Exclaimer.Console.Elements.Action.set_SnapIn(MMCSnapIn value) at Exclaimer.Console.MMCSnapIn.FillActionList(NavBarControl itp) at Exclaimer.Console.Host.Engine.ExclaimerConsole.InitCtls() 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.Form.WndProc(Message& m) at Exclaimer.Common.UI.ExclaimerForm.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


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Resolution

Please ensure that the Windows DPI display settings are configured to 100%.

Exclaimer products do not support DPI settings other than the system default 100% scaling.


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