Intermittent email issue

We are having a problem with a report that is scheduled to be emailed
only works sometimes. Other time it fails with a "Reporting Services
Failure sending mail: Cannot access a closed file" error message.
The report is running off a snapshot that is generated every half hour
and a subscription is setup to email the report to some users. The
snapshot is generated even when the email fails.
It seems the problem is pointed to by userName: [DOMAIN\username]not
found in the database. This seems to be a security problem - but why
would it work sometimes? The log file is below for reference. The user
in question is in the same domain as the report service is running
under.
Environment:
Report service SP2 running on a Windows 2003 EE with SQL Server 2000
Active Director Domain server running on Windows 2003 EE
The report server service is running under a domain account that is in
the local administrator group on the local server.
Has anyone seen this problem?
Thanks
ReportingServicesService!library!2b4!09/02/2005-09:09:38:: i INFO:
Initializing EnableExecutionLogging to 'True' as specified in Server
system properties.
ReportingServicesService!session!2b4!09/02/2005-09:09:38:: i INFO:
LoadSnapshot: Item with session: tc2ixx55bnczhjifyjr2z42q, reportPath:
/Company Reports/MyReport, userName: [DOMAIN\username]not found in the
database
ReportingServicesService!chunks!2b4!09/02/2005-09:09:38:: i INFO: ###
GetReportChunk('MyReport_style', 1), chunk was not found!
this=38c10bb1-1bae-4d41-a03e-f56437fc3c86
ReportingServicesService!emailextension!2b4!09/02/2005-09:09:38:: Error
sending email. System.ObjectDisposedException: Cannot access a closed
file.
at System.IO.__Error.FileNotOpen()
at System.IO.FileStream.Read(Byte[] array, Int32 offset, Int32
count)
at
Microsoft.ReportingServices.Library.PartitionFileStream.Read(Byte[]
buffer, Int32 offset, Int32 count)
at
Microsoft.ReportingServices.Library.MemoryUntilThresholdStream.Read(Byte[]
buffer, Int32 offset, Int32 count)
at Microsoft.ReportingServices.Library.RSStream.Read(Byte[] buffer,
Int32 offset, Int32 count)
at
Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.EmbedReport(IMessage
message, RenderedOutputFile[] reportData, Notification notification,
SubscriptionData data)
at
Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.ConstructMessageBody(IMessage
message, Notification notification, SubscriptionData data)
at
Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.CreateMessage(Notification
notification)
at
Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.Deliver(Notification
notification)
ReportingServicesService!notification!2b4!09/02/2005-09:09:38::
Notification 2180101f-6faa-41b7-b1a0-b3217c5d630e completed. Success:
False, Status: Failure sending mail: Cannot access a closed file.,
DeliveryExtension: Report Server Email, Report: MyReport, Attempt 0
ReportingServicesService!dbpolling!2b4!09/02/2005-09:09:38::
NotificationPolling finished processing item
2180101f-6faa-41b7-b1a0-b3217c5d630ejmbackup1024@.gmail.com wrote:
> We are having a problem with a report that is scheduled to be emailed
> only works sometimes. Other time it fails with a "Reporting Services
> Failure sending mail: Cannot access a closed file" error message.
> The report is running off a snapshot that is generated every half hour
> and a subscription is setup to email the report to some users. The
> snapshot is generated even when the email fails.
> It seems the problem is pointed to by userName: [DOMAIN\username]not
> found in the database. This seems to be a security problem - but why
> would it work sometimes? The log file is below for reference. The user
> in question is in the same domain as the report service is running
> under.
> Environment:
> Report service SP2 running on a Windows 2003 EE with SQL Server 2000
> Active Director Domain server running on Windows 2003 EE
> The report server service is running under a domain account that is in
> the local administrator group on the local server.
> Has anyone seen this problem?
> Thanks
> ReportingServicesService!library!2b4!09/02/2005-09:09:38:: i INFO:
> Initializing EnableExecutionLogging to 'True' as specified in Server
> system properties.
> ReportingServicesService!session!2b4!09/02/2005-09:09:38:: i INFO:
> LoadSnapshot: Item with session: tc2ixx55bnczhjifyjr2z42q, reportPath:
> /Company Reports/MyReport, userName: [DOMAIN\username]not found in the
> database
> ReportingServicesService!chunks!2b4!09/02/2005-09:09:38:: i INFO: ###
> GetReportChunk('MyReport_style', 1), chunk was not found!
> this=38c10bb1-1bae-4d41-a03e-f56437fc3c86
> ReportingServicesService!emailextension!2b4!09/02/2005-09:09:38:: Error
> sending email. System.ObjectDisposedException: Cannot access a closed
> file.
> at System.IO.__Error.FileNotOpen()
> at System.IO.FileStream.Read(Byte[] array, Int32 offset, Int32
> count)
> at
> Microsoft.ReportingServices.Library.PartitionFileStream.Read(Byte[]
> buffer, Int32 offset, Int32 count)
> at
> Microsoft.ReportingServices.Library.MemoryUntilThresholdStream.Read(Byte[]
> buffer, Int32 offset, Int32 count)
> at Microsoft.ReportingServices.Library.RSStream.Read(Byte[] buffer,
> Int32 offset, Int32 count)
> at
> Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.EmbedReport(IMessage
> message, RenderedOutputFile[] reportData, Notification notification,
> SubscriptionData data)
> at
> Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.ConstructMessageBody(IMessage
> message, Notification notification, SubscriptionData data)
> at
> Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.CreateMessage(Notification
> notification)
> at
> Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.Deliver(Notification
> notification)
> ReportingServicesService!notification!2b4!09/02/2005-09:09:38::
> Notification 2180101f-6faa-41b7-b1a0-b3217c5d630e completed. Success:
> False, Status: Failure sending mail: Cannot access a closed file.,
> DeliveryExtension: Report Server Email, Report: MyReport, Attempt 0
> ReportingServicesService!dbpolling!2b4!09/02/2005-09:09:38::
> NotificationPolling finished processing item
> 2180101f-6faa-41b7-b1a0-b3217c5d630e
Experiencing a very similar issue, running SP1. I created a
parameterized report, from which 93 link reports point to. Those 93
linked reports are set to run nightly at 2:00 am by generating a
snapshot (for historical purposes). All 93 snapshots were created
within about 3 mintutes of 2:00 am. The subscription is suposed to
fire an email whenever it is updated, but only half or so are
successful. On those that are unsuccessful, I get no error message at
all.
It seems timed subscriptions work just fine. Perhaps what I will do is
send the email based only on a timed subscription and also create a
snapshot for historical purposes...I would much rather not have to do
double the processor work, as many more reports are needed for
conversion.