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Error in WebDateChooser Rendering
posted

I have  deployed an ASP.NET 2.0 application that is using neadvantage 7.1 for ASP.NET. Sometimes randomly, when a page that contains webdatechooser control is loaded, the following error occurs:

 

Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;}

Object reference not set to an instance of an object. Stack Trace: at Infragistics.WebUI.Shared.WebAgent.GetPageControl(Control control) at Infragistics.WebUI.Shared.WebAgent.get_EnableAppStylingResolved() at Infragistics.WebUI.WebSchedule.WebDateChooser.get_IsAppStyling() at Infragistics.WebUI.WebSchedule.WebDateChooser.OnPreRender(EventArgs e) at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

  The user can go further unless the IIS server is restarted. As you can see, all the method call that are involved in the error are from Infragistics and .net framework. Any clue on how to solve the problem?

 Note: Sometimes the error appears for other infragistics control such as ultrawebgrid etc.