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Best way to figureout why a report wont load in the designer?

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This is a migrated thread and some comments may be shown as answers.
sitefinitysteve
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sitefinitysteve asked on 27 Sep 2010, 03:11 PM
Does anyone know how to figure out why a report might not be loading in the designer?

I'm getting this generic error...

To prevent possible data loss before loading the designer, the following errors must be resolved:
1 Error
Why am I seeing this page?
Value cannot be null. Parameter name: instance
 
Instances of this error (1)
1.
at System.ComponentModel.TypeDescriptor.AddAttributes(Object instance, Attribute[] attributes)
at Microsoft.VisualStudio.Design.VSDesignSurface.CreateDesigner(IComponent component, Boolean rootDesigner)
at System.ComponentModel.Design.DesignerHost.AddToContainerPostProcess(IComponent component, String name, IContainer containerToAddTo)
at System.ComponentModel.Design.DesignerHost.PerformAdd(IComponent component, String name)
at System.ComponentModel.Design.DesignerHost.System.ComponentModel.Design.IDesignerHost.CreateComponent(Type componentType, String name)
at System.ComponentModel.Design.Serialization.DesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer)
at System.ComponentModel.Design.Serialization.DesignerSerializationManager.System.ComponentModel.Design.Serialization.IDesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer)
at System.ComponentModel.Design.Serialization.TypeCodeDomSerializer.Deserialize(IDesignerSerializationManager manager, CodeTypeDeclaration declaration)
at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager)
at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager)
at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.DeferredLoadHandler.Microsoft.VisualStudio.TextManager.Interop.IVsTextBufferDataEvents.OnLoadCompleted(Int32 fReload)
 
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Massimiliano Bassili
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answered on 28 Sep 2010, 12:53 PM
This looks like the good old "just let VS sit down for lunch or sleep with Windows" error I've been getting in Windows Forms since .NET framework came out. In my expertize, closing the form (in your case designer) and reopening it should do the trick. If it does not, try rebuilding or if stubborn you can close VS and reopen the whole thing.

Cheers!
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sitefinitysteve
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answered on 28 Sep 2010, 01:36 PM
Something funky was going on...updated to the latest release and that fixed it :/  Caused some more errors I need to resolve though :D
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