打开栅格数据集失败

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ESRI.ArcGIS.DataSourcesRaster;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;


namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            ESRI.ArcGIS.esriSystem.AoInitialize aoInit;
            #region Initialize Licensing
            try
            {
                Console.WriteLine("Obtaining License");
                ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.Desktop);
                aoInit = new AoInitializeClass();
                esriLicenseStatus licStatus = aoInit.Initialize(esriLicenseProductCode.esriLicenseProductCodeAdvanced);
                Console.WriteLine("Ready with license");
            }
            catch (Exception exc)
            {
                // If it fails at this point, shutdown the test and ignore any subsequent errors.
                Console.WriteLine("Fails:" + exc.Message);
                return;
            }
            #endregion

            IWorkspaceFactory pWorkspaceFactory = new RasterWorkspaceFactoryClass();
            string strPath = @"D:\数据";
            IWorkspace pWS = pWorkspaceFactory.OpenFromFile(strPath, 0);
            IRasterWorkspace pRWS = pWS as IRasterWorkspace;
            IRaster pRaster = pRWS.OpenRasterDataset("chinaelev1.tif").CreateDefaultRaster();

            IUniqueValues pUv = new UniqueValuesClass();
            IRasterCalcUniqueValues pRcuv = new RasterCalcUniqueValuesClass();
            pRcuv.AddFromRaster(pRaster, 0, pUv);
            object pUniqueValues, pCounts;
            pUv.GetHistogram(out pUniqueValues,out pCounts);
        }
    }

}

调试的时候到了pRWS.OpenRasterDataset("chinaelev1.tif")这一句，提示“打开栅格数据集失败”，我以为是license的原因，可是反复设置license文件，也不能解决问题，后来把@"D:\数据";的数据目录改为英文就能过去了，真是奇葩呀！！谁能知道是什么原因呢？各位亲