Encapsulate (save) PDF with FO-DICOM (into a DCM file)

encapsulate.cs

public static void Encapsulate( Patient patient, Study study, Institution institution, string directory, string filename, byte[] pdf )
{
  var name = new DicomPersonName( DicomTag.PatientName, patient.LastName, patient.FirstName,
    patient.MiddleName, patient.NamePrefix, patient.NameSuffix );
  var studyUID = new DicomUID( study.InstanceUID, "Study Instance UID", DicomUidType.SOPInstance );
  var company = Assembly.GetEntryAssembly().GetCustomAttribute<AssemblyCompanyAttribute>().Company;
  var product = Assembly.GetEntryAssembly().GetCustomAttribute<AssemblyProductAttribute>().Product;

  DicomDataset[] refItems = study.Series
      .SelectMany( s => s.Datasets )
      .Select( d => new DicomDataset
      {
          { DicomTag.ReferencedSOPClassUID, d.ClassUID },
          { DicomTag.ReferencedSOPInstanceUID, d.InstanceUID }
      } ).ToArray();

  var sourceInstances = new DicomSequence( DicomTag.SourceInstanceSequence, refItems );
  var conceptName = new DicomSequence( DicomTag.ConceptNameCodeSequence );

  var generator = new DicomUIDGenerator();
  var dataset = new DicomDataset
  {
      { DicomTag.SpecificCharacterSet, series.SpecificCharacterSet },
      { DicomTag.InstanceCreationDate, DateTime.Now },
      { DicomTag.InstanceCreationTime, DateTime.Now },
      { DicomTag.SOPClassUID, DicomUID.EncapsulatedPDFStorage },
      { DicomTag.SOPInstanceUID, generator.Generate() },
      { DicomTag.StudyDate, study.DateTime.Date },
      { DicomTag.ContentDate, DateTime.Now },
      { DicomTag.AcquisitionDateTime, DateTime.Now },
      { DicomTag.StudyTime, study.DateTime },
      { DicomTag.ContentTime, DateTime.Now },
      { DicomTag.AccessionNumber, study.AccessionNumber.ToString( CultureInfo.InvariantCulture ) },
      { DicomTag.Modality, "DOC" },
      { DicomTag.ConversionType, "WSD" },
      { DicomTag.ImageLaterality, planning.PatientSide },
      { DicomTag.Manufacturer, company },
      { DicomTag.ManufacturerModelName, product },
      { DicomTag.ReferringPhysicianName, (string)null },
      { DicomTag.PatientID, patient.ID },
      { DicomTag.PatientBirthDate, patient.BirthDate },
      { DicomTag.PatientSex, patient.Sex },
      { DicomTag.StudyInstanceUID, study.InstanceUID },
      { DicomTag.StudyDescription, study.Description },
      { DicomTag.SeriesInstanceUID, generator.Generate( studyUID ) },
      { DicomTag.SeriesDescription, $"{product} {planning.Description}" },
      { DicomTag.PerformingPhysicianName, Environment.UserName },
      { DicomTag.SeriesDate, DateTime.Now },
      { DicomTag.SeriesTime, DateTime.Now },
      { DicomTag.StudyID, study.ID },
      { DicomTag.SeriesNumber, planning.Series.OrderBy( s => s.Number ).Last().Number + 1 },
      { DicomTag.InstanceNumber, 1 },
      { DicomTag.BurnedInAnnotation, "YES" },
      { DicomTag.DocumentTitle, $"{product} Generated Document" },
      { DicomTag.VerificationFlag, "UNVERIFIED" },
      { DicomTag.MIMETypeOfEncapsulatedDocument, "application/pdf" },
      name,
      sourceInstances,
      conceptName,
      { DicomTag.EncapsulatedDocument, pdf }
  };

  dataset.Add( DicomTag.InstitutionName, institution.Name );
  dataset.Add( DicomTag.InstitutionAddress, institution.Address );
  dataset.Add( DicomTag.InstitutionalDepartmentName, institution.Department );

  var dicomFile = new DicomFile( dataset );
  using ( var file = new FileStream( Path.Combine( directory, filename ), FileMode.Create ) )
  {
      dicomFile.Save( file );
  }
}

Association Abort [source: ServiceProvider; reason: InvalidPDUParameter] I get an error, what could be the cause? I get this error when sending to pacs server.