Error: IsComplete is not found

soap:ServerSystem.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Runtime.InteropServices.COMException (0x8000FFFF): Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))
   at Promt.Pits.Translator.Services.PTService.StartTranslateHtmlFile(Int32 DirId, String TplId, Byte[] data, TemplateDataSet Context, String URLBase, String HrefPrefix)
   at Promt.Pits.Translator.Services.Translator2.TranslateHTMLFile(Int32 DirId, String TplId, Byte[] data, TemplateDataSet Context, String URLBase, String HrefPrefix)
   --- End of inner exception stack trace ---