[HttpException (0x80004005): The ControlToValidate property of 'rfvReciver' cannot be blank.]
System.Web.UI.WebControls.BaseValidator.ControlPropertiesValid() +11609946
System.Web.UI.WebControls.BaseValidator.OnPreRender(EventArgs e) +56
System.Web.UI.Control.PreRenderRecursiveInternal() +132
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3671
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