Datatable returning HasError and RowError

if (rdBiologicalMeasures.Checked)             {                 objRetrieveControlMeasureData = blPopulate.BLRetrieveControlMeasureData("BiologicalControl");                 if (HttpContext.Current.Session["FinalPestCode"] != null && objRetrieveControlMeasureData.Rows.Count > 0)                 {                     var Biological = (from Bio in objRetrieveControlMeasureData.AsEnumerable() where Bio["p_name"].ToString() == HttpContext.Current.Session["FinalPestCode"].ToString() select Bio).ToList();      &nbs ...