Null reference exception when call dispose

Docking/MDI for Windows Forms Forum

Posted 12 years ago by Ernesto Serrano - Software Developer, VyS Yecla S.L.
Version: 2.0.0093
Platform: .NET 2.0
Environment: Windows XP (32-bit)
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In the dispose method of a Form I'm calling dispose to some controls to help GC to collect they, but when I dispose the dockmanager object i'm getting this exception:

Message: {"Referencia a objeto no establecida como instancia de un objeto."} (Null reference exception in spanish)

Source: "ActiproSoftware.UIStudio.Dock.Net20"
StackTrace:
en ActiproSoftware.UIStudio.Dock.DockManager.a(ContainerControl A_0)
en ActiproSoftware.UIStudio.Dock.DockManager.Dispose(Boolean disposing)
en System.ComponentModel.Component.Dispose()
en VSControls.Grupo.Dispose(Boolean disposing) en N:\Proyectos\Controles\Controles\Ventanas\Principal\Controles\Grupo.vb:línea 1906

I hope this helps you, thanks!

Comments (1)

Posted 12 years ago by Actipro Software Support - Cleveland, OH, USA
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Hi Ernesto,

Can you email over a small sample project that reproduces this? There is a lot of code in the Dispose method so we need to be able to debug it to see what is happening in your situation. Thanks!


Actipro Software Support

The latest build of this product (v2018.1 build 0341) was released 6 months ago, which was after the last post in this thread.

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