CRM workflow to send a report attachment to users - reporting-services

Question

I have written some code to send an email attachment through CRM to a specific user, using a workflow, the attachment is a transcript report which contains 2 sub reports in order to get some data about students. The problem that i have is that the email is not delivered and the attachment breaks indicating this:
"Data retrieval failed for the subreport, 'Subreport2', located at:
/StudentReports/StudentAddress. Please check the log files for more
information."
The log files contain no useful information. Here is the code:
using Microsoft.Crm.Sdk;
using Microsoft.Crm.Sdk.Query;
using Microsoft.Crm.Workflow;
using NUP.CRM.DAL;
using NUP.CRM.DAL.Utility;
using NUP.CRM.Utilities;
using System.Collections.Generic;
using System.Workflow.ComponentModel;
namespace NUP.CRM.WorkFlows
{
/// <summary>
/// Sends transcript of a given assessment board and ac. year as attachment to email
/// </summary>
[CrmWorkflowActivity("Send email with Report Attached", "NUP")]
public class SendReport : Activity
{
public static DependencyProperty AcademicYearProperty = DependencyProperty.Register("AcademicYear", typeof(string), typeof(SendReport));
public static DependencyProperty AssBoardProperty = DependencyProperty.Register("AssBoard", typeof(string), typeof(SendReport));
public static DependencyProperty EmailAddressTypeProperty = DependencyProperty.Register("EmailAddressType", typeof(string), typeof(SendReport));
public static DependencyProperty EmailBodyProperty = DependencyProperty.Register("EmailBody", typeof(string), typeof(SendReport));
public static DependencyProperty IsPositiveProperty = DependencyProperty.Register("IsPositive", typeof(CrmBoolean), typeof(SendReport));
public static DependencyProperty ReportNameProperty = DependencyProperty.Register("ReportName", typeof(string), typeof(SendReport));
public static DependencyProperty ReportPathProperty = DependencyProperty.Register("ReportPath", typeof(string), typeof(SendReport));
public static DependencyProperty SenderProperty = DependencyProperty.Register("Sender", typeof(Lookup), typeof(SendReport));
public static DependencyProperty SendFromAddressProperty = DependencyProperty.Register("SendFromAddress", typeof(string), typeof(SendReport));
public static DependencyProperty SubjectProperty = DependencyProperty.Register("Subject", typeof(string), typeof(SendReport));
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
IWorkflowContext context = executionContext.GetService<IContextService>().Context;
ICrmService service = context.CreateCrmService();
byte[] report = ReportUtility.GetReport(
ReportPath,
ReportUtility.Formats.PDF,
new string[] { "contactid", "AcYear", "IsPositive", "AssBoard" },
new string[] {
context.PrimaryEntityId.ToString(),
AcademicYear.ToString(),
IsPositive.Value.ToString(),
AssBoard }
);
string addressToUse = DynamicEntityUtility.GetContactEmailOfType(service, context.PrimaryEntityId, EmailAddressType);
EmailUtility emailUtility =
new EmailUtility(service, context.UserId, context.PrimaryEntityId, addressToUse);
List<EmailUtility.Attachment> attachments =
new List<EmailUtility.Attachment>()
{
new EmailUtility.Attachment(ReportName, report)
};
emailUtility.Send(Subject, attachments);
return ActivityExecutionStatus.Closed;
}
[CrmInput("AcademicYear")]
public string AcademicYear
{
get
{
return (string)base.GetValue(AcademicYearProperty);
}
set
{
base.SetValue(AcademicYearProperty, value);
}
}
[CrmInput("AssBoard")]
public string AssBoard
{
get
{
return (string)base.GetValue(AssBoardProperty);
}
set
{
base.SetValue(AssBoardProperty, value);
}
}
[CrmInput("EmailAddressType")]
public string EmailAddressType
{
get
{
return (string)base.GetValue(EmailAddressTypeProperty);
}
set
{
base.SetValue(EmailAddressTypeProperty, value);
}
}
[CrmInput("EmailBody")]
public string EmailBody
{
get
{
return (string)base.GetValue(EmailBodyProperty);
}
set
{
base.SetValue(EmailBodyProperty, value);
}
}
[CrmInput("IsPositive")]
public CrmBoolean IsPositive
{
get
{
return (CrmBoolean)base.GetValue(IsPositiveProperty);
}
set
{
base.SetValue(IsPositiveProperty, value);
}
}
[CrmInput("ReportName")]
public string ReportName
{
get
{
return (string)base.GetValue(ReportNameProperty);
}
set
{
base.SetValue(ReportNameProperty, value);
}
}
[CrmInput("ReportPath")]
public string ReportPath
{
get
{
return (string)base.GetValue(ReportPathProperty);
}
set
{
base.SetValue(ReportPathProperty, value);
}
}
[CrmReferenceTarget("systemuser"), CrmInput("Sender")]
public Lookup Sender
{
get
{
return (Lookup)base.GetValue(SenderProperty);
}
set
{
base.SetValue(SenderProperty, value);
}
}
[CrmInput("SendFromAddress")]
public string SendFromAddress
{
get
{
return (string)base.GetValue(SendFromAddressProperty);
}
set
{
base.SetValue(SendFromAddressProperty, value);
}
}
[CrmInput("Subject")]
public string Subject
{
get
{
return (string)base.GetValue(SubjectProperty);
}
set
{
base.SetValue(SubjectProperty, value);
}
}
}
}