Error 0x800C0008 with multiple subreports

Hi,

strange behaviour in our production environment, while in the test servers all goes ok:

web application with web report viewer, the report is fine but clicking on "preview" or "print" an error 0x800C008 occurs.

The report include 3 subreports, and here's the problem: after some attempts i realized that each subreport (alone in the master report) works fine, but more than 1 in the same master report produces the error!

Here is the log:

w3wp!library!7!04/17/2007-11:23:55:: i INFO: Call to RenderNext( '/WRReports/Orders' )
w3wp!processing!7!04/17/2007-11:23:55:: a ASSERT: Assertion failed! Call stack:
Microsoft.ReportingServices.ReportProcessing.Persistence.IntermediateFormatReader.Assert(Boolean condition)
Microsoft.ReportingServices.ReportProcessing.Persistence.IntermediateFormatReader.RegisterDefinitionObject(IDOwner idOwner)
Microsoft.ReportingServices.ReportProcessing.Persistence.IntermediateFormatReader.ReadReportItemBase(ReportItem reportItem)
...
Microsoft.ReportingServices.Library.AsyncExecution.AsyncStartMain(Object state)
Microsoft.ReportingServices.Diagnostics.CancelablePhaseBase.ExecuteWrapper()
Microsoft.ReportingServices.Diagnostics.ThreadWorkItem.SafeThreadPoolCallback(Object ctx)
System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state)
System.Threading.ExecutionContext.runTryCode(Object userData)
System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)

w3wp!library!7!04/17/2007-11:23:55:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException: Errore interno nel server di report. Per ulteriori informazioni, vedere il log degli errori., un-named assertion fired for component processing;
Info: Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException: Errore interno nel server di report. Per ulteriori informazioni, vedere il log degli errori.

Any ideas?

Thanks in advance to anyone

Hi all,

we found the solution and so we can post it for public utility.

The problem were related to the size of reports.

When reports exceed a few bytes, reporting services uses a "transfer-enconding: chunked" header in the http message from the rssclientreport object in the html page.

So, a proxy in the middle of our architecture were unable to do its job because it didn't understand that header; an installation of the last version of that proxy solved the problem.

We didn't found any way to change that behavior of ssrs2005 and forcing it to use standard transfer encoding.

bye.