SQL加载程序已成功加载但返回致命错误

Question

我在安装了Oracle客户端11g的Windows 7中运行了以下代码。 SQL Loader日志文件表示成功加载了10行，但退出代码在某些计算机上返回4 - 致命错误。究竟是什么问题？请指教。

Public Shared Function RunSQLLoader(ByVal intImportID As Integer, ByVal strFilePath As String) As Boolean
        Dim wsh As Object = CreateObject("WScript.Shell")
        Dim waitOnReturn As Boolean = True
        Dim windowStyle As Integer = 0
        Dim exitCode As Integer

        exitCode = wsh.Run("sqlldr control=\\server\folder\upload.ctl data=\\server\folder\file.txt log=server\folder\file.log", windowStyle, waitOnReturn)

        If exitCode = 0 Then
            Return True
        Else
            ExecuteError(intImportID, "SQL Loader Command Failure", "Fail to upload " & strFilePath & " with an exit code: " & exitCode)
            Return False
        End If
    End Function