DOCUMENT:Q249846  28-MAY-2001  [winnt]
TITLE   :PRB: Event ID 4250 When Calling Queued Components
PRODUCT :Microsoft Windows NT
PROD/VER::2000,6.0
OPER/SYS:
KEYWORDS:kbCOMPlus kbOSWin2000 kbVBp600 kbVS600 kbDSupport kbComPlusQC

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The information in this article applies to:

 - Microsoft Windows 2000 Advanced Server 
 - Microsoft Windows 2000 Server 
 - Microsoft Windows 2000 Professional 
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SYMPTOMS
========

When calling the method of a queued component instance that takes in an object
as one of its arguments, the following event log error is generated on the
client computer:

   Event Type: Error
   Event Source: COM+
   Event Category: QC Marshal
   Event ID: 4250
   Date: 11/22/1999
   Time: 6:35:42 PM
   User: N/A
   Computer: EDJEZ5
   Description:
   An unsupported object reference was used during a method call to a QC
   component. The object reference should either be a QC recorder or support
   IPersistStream.
   QI for IPersistStream
   Server Application ID: {54535BAC-9DC4-4EC0-957E-3193CEA2C785}
   Server Application Name: Orders
   Error Code = 0x80004002 : No such interface supported
   COM+ Services Internals Information: File: .\marshalinterceptor.cpp, Line: 210
   Data: 0000: 9f302940 48b3244b a08eb2bb 63b1b32b -->

CAUSE
=====

This error will appear if the argument object reference is not:

 - An instance of a queued component recorder.

   -or-

 - A reference of an object that supports IPersistStream.

RESOLUTION
==========

To resolve this problem, make sure that the argument object supports
IPersistStream (in Visual Basic 6.0, you can do this by marking the class as
"persistable") or that it also is an instance of a queued component.

STATUS
======

This behavior is by design.

REFERENCES
==========

MSDN Online Library Queued Components
(http://msdn.microsoft.com/isapi/msdnlib2.idc?theURL=/library/psdk/cossdk/pgservices_queuedcomponents_2vhv.htm)

For additional information, click the article number below to view the article in
the Microsoft Knowledge Base:

   Q246627 Passing Objects as Parameters to COM+ Queued Components

(c) Microsoft Corporation 2000, All Rights Reserved.
Contributions by Edward Jezierski, Microsoft Corporation


Additional query words: 4250 QC error marshalinterceptor IPersistStream object Marshal

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Keywords          : kbCOMPlus kbOSWin2000 kbVBp600 kbVS600 kbDSupport kbComPlusQC 
Technology        : kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000Serv kbwin2000ServSearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro kbWinAdvServSearch
Version           : :2000,6.0
Issue type        : kbprb

=============================================================================

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