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"External table not in expected format" because account cannot use proxy

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ontap-9
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Applies to

  • ONTAP 9
  • CIFS/SMB
  • Group Policy Object (GPO)
  • network proxy
  • Microsoft Excel
  • OLE DB

Issue

  • Script running on Windows host uses OLE DB API to create xlsx file in ONTAP SMB share
  • Script creates the xlsx file, but does not properly populate the contents
  • Script logs error External table not in expected format 
    • ​​​​​hostname:: ERROR :: Export of data failed - System.Data.OleDb.OleDbException (Ox80004005): External table is not in the expected format.
  at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
  at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
  at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
  at System.Data.OleDb.OleDbCommand.ExecuteReaderlnternal(CommandBehavior behavior, String method)
  at System.Data.OleDb.OleDbCommand.ExecuteNonQuery()
  at TechnologyServices.Utilities.Offce.Excel.Export(DataTable dt, String path)
  at TechnologyServices.Utilities.Offce.Excel.Export(DataSet ds, String path)
  at script.DataAccess.Export()
Logger: script.DataAccess
Date: 2025-08-20 11:23:24,721

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