ArcEngine栅格提取值失败

 pitem =
                                (IFeatureClass)ExtractionOp.ExtractValuesToPoints((IGeoDataset)pitem,
                                    dataset.Value);
                            StatisticsUtil.RenameField(pitem, "RASTERVALU", dataset.Key);
为什么从栅格中提取值总是会报错
System.String property:[(null)] - 错误描述：异常来自 HRESULT:0x80040351
System.Runtime.InteropServices.COMException (0x80040351): 异常来自 HRESULT:0x80040351