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Unhandled Exception Method not found - error on Webgility Desktop Launch

This article helps Webgility Desktop users in resolving the “Unhandled Exception Method not found: 'Void System.Windows.Forms.ToolItem.set_BackgroundImageLayout(System.Windows.Forms.ImageLayout)'” error in Webgility Desktop. It provides step-by-step guidance to update the application and restore normal operation, ensuring users can launch and use Webgility Desktop without encountering this Windows Forms error.

Error Message:

Unhandled Exception Method not found:'VoidSystem.Windows.forms.ToolItem.set_Backgroundimagelayout(System.Windows.form.imagelayout)'

Cause of the issue:

This error typically occurs when trying to launch Webgility Desktop. This error indicates that Webgility Desktop needs an update.

Steps to fix:

Take a latest backup of Webgility Desktop database and then upgrade it to the latest version. 

Follow the steps in this helpful article on How to Update Your Webgility Desktop Software

Once done then try to login again.