Duda Ista D se cuelga al finalizar el test de vehículo

Hola! Estoy intentando registrar un cambio de batería con ISTA y tras instalarlo y seguir un tutorial que he encontrado por ahí, me encuentro con este problema: ISTA se queda pillado justo al finalizar el test de vehículo. La app deja de responder. Lo he dejado más de 10 minutos y no veo que avance. Alguna idea?




UPDATE: Más info

En el log de ISTA veo esto justo al final. Parece como si no pudiese crear el PDF final con el informe del test:

CODE, HTML o PHP Insertado:

2020-03-18 16:48:21 ERROR [T] ISTA: [11] XmlValidator.VaildationEventHandler() - Exception: The element 'SessionInfo' has invalid child element 'AnalysisRelevance'. List of possible elements expected: 'SessionIdent'., Severity: Error
2020-03-18 16:48:21 ERROR [T] ISTA: [11] XmlValidator.VaildationEventHandler() - Exception: The 'Countrycode' element is invalid - The value '' is invalid according to its datatype 'String' - The actual length is less than the MinLength value., Severity: Error
2020-03-18 16:48:21 INFO [T] ISTA: [11] OperationReportUtils.SaveBehdatAsPdf() - Source file: ..\..\..\FASTAOut\1_YYYYYYY_00000_00000_00_20200318_163415.behdat
2020-03-18 16:48:21 INFO [T] ISTA: [11] OperationReportUtils.TransformToHtml() - Starting transformation to html of operations report.
2020-03-18 16:48:21 INFO [T] ISTA: [11] ConfigSettings.StoreAndLogChangedValue() - Change configuration "SaveDocumentsAsHtml" from "" to "False".
2020-03-18 16:48:21 INFO [T] ISTA: [11] OperationReportUtils.SaveBehdatAsPdf() - Target PDF-File: ..\..\..\Print\20200318_164821_Operations_report.pdf
2020-03-18 16:48:21 INFO [T] ISTA: [11] ConfigSettings.StoreAndLogChangedValue() - Change configuration "HtmlToPdfConverterLocation" from "" to "../../../wkhtmltopdf/wkhtmltopdf.exe" (read from "").
2020-03-18 16:48:21 INFO [T] ISTA: [11] PdfConvert.ConvertHtmlToPdf - Started. Output: ..\..\..\Print\20200318_164821_Operations_report.pdf
2020-03-18 16:48:21 ERROR [T] ISTA: [11] OperationReportUtils.SaveBehdatAsPdf() - failed with exception: System.IO.IOException: The pipe has been ended.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.FileStream.Write(Byte[] array, Int32 offset, Int32 count)
at Codaxy.WkHtmlToPdf.PdfConvert.ConvertHtmlToPdf(PdfDocument document, PdfConvertEnvironment environment, PdfOutput woutput)
at BMW.Rheingold.RheingoldSessionController.OperationReportUtils.SaveBehdatAsPdf(String behdatFilePath, String vin7, IPrintConfig printConfig)
2020-03-18 16:48:21 INFO [T] ISTA: [11] IstaOperationLogic.CloseOperationFasta() - Send File "..\..\..\FASTAOut\1_YYYYYYY_00000_00000_00_20200318_163415.behdat" to FBM.
2020-03-18 16:48:21 WARNING [T] ISTA: [11] Logic.SendFastaData() - failed with exception: System.NullReferenceException: Object reference not set to an instance of an object.
at BMW.Rheingold.RheingoldSessionController.Logic.SendFastaData(String filename)
2020-03-18 16:48:21 INFO [T] ISTA: [11] Logic.DisconnectFasta() - called
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