Sharepoint workflow "Error Occurred"
===

I am using Word Automation Services to convert word documents into pdf documents when they are added to a library.  After the conversion is complete I want to do some post processing on the pdf.  I am using a sequential workflow to manage the process.  Here is my code for the workflow:


    namespace Workflow1.NewDoc
    {
      public sealed partial class NewDoc : SequentialWorkflowActivity
      {
        public NewDoc()
        {
          InitializeComponent();
        }

        public Guid workflowId = default(System.Guid);
        public SPWorkflowActivationProperties workflowProperties = new SPWorkflowActivationProperties();

        private Guid jobId;
        private ConversionJobStatus jobStatus;

        private void startConversion_ExecuteCode(object sender, EventArgs e)
        {
            SPList pdfList = workflowProperties.Web.Lists["PDF Pages"];

            // create a folder for the pdf output if needed
            string folderName = workflowProperties.ItemId.ToString();
            SPFolder folder;
            try
            {
                folder = pdfList.RootFolder.SubFolders[folderName];
            }
            catch (ArgumentException ex)
            {
                folder = pdfList.RootFolder.SubFolders.Add(folderName);
                folder.Update();
            }

            //create a conversion job
            ConversionJob job = new ConversionJob("Word Automation Services");

            //specify conversion settings 
            job.UserToken = workflowProperties.OriginatorUser.UserToken;
            if (workflowProperties.Site.SiteSubscription != null)
                job.SubscriptionId = workflowProperties.Site.SiteSubscription.Id;
            job.Settings.OutputFormat = SaveFormat.PDF;
            job.Name = "Archive Document Workflow";

            //add the file 
            string docUrl = workflowProperties.WebUrl + "/" + workflowProperties.ItemUrl;
            string pdfUrl = Path.ChangeExtension(workflowProperties.WebUrl + "/" + folder.Url + "/" + workflowProperties.Item.File.Name, "pdf");
            job.AddFile(docUrl, pdfUrl);

            //schedule the conversion 
            job.Start();

            //record the jobid
            this.jobId = job.JobId;
            this.jobStatus = new ConversionJobStatus("Word Automation Services", this.jobId, null);
        }
        
        private void isDocumentConverting(object sender, ConditionalEventArgs e)
        {
            e.Result = (this.jobStatus.Count != this.jobStatus.Succeeded);
        }
      }
    }
The conversion completes successfully however the workflow has a status of `Error Occurred`.  Whenever I change

    e.Result = (this.jobStatus.Count != this.jobStatus.Succeeded);
to

    e.result = false;
the workflow completes successfully.  Does anyone have any idea of what is causing the error or how I can determine more information about what is causing the error? Thanks.