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crash when ultrawebtree is used with WHD
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Hi,

I have a ultrawebtree based user control on my page which allows the user to select lets say a Category. Then I will pass this parameter to build a WHD.

However, I am getting a crash when I click on the expand button on any of the ultrawebtree's level 1 nodes. It has something to do with the WHD but Ia m not sure what!

Crash trace:

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

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

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 

[NullReferenceException: Object reference not set to an instance of an object.]
   Infragistics.Web.UI.GridControls.HierarchicalGridBot.LoadClientStateForBands() +69
   Infragistics.Web.UI.GridControls.WebHierarchicalDataGrid.LoadViewState(Object savedState) +312
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +183
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Page.LoadAllState() +312
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661

We are on a time sensitive project and any help would be appreciated.