Access Violation in RPCRT4.DLL When Pickling Buffered RPC Data (158516)
The information in this article applies to:
- Microsoft Windows NT Server 4.0 Terminal Server Edition
- Microsoft Windows NT Workstation 4.0
- Microsoft Windows NT Server 4.0
This article was previously published under Q158516 SYMPTOMS
Pickling, or serialization, is a Remote Procedure Call (RPC) process of
marshaling data (encoding) and unmarshaling data (decoding) from buffers
that you own. When you pickle and use wire_marshal, you may experience an
Access Violation in Rpcrt4.dll. The wire_marshal attribute specifies a data
type that will be used for transmission (the wire-type) instead of an
application-specific data type (the userm-type). Each userm-type has a one-
to-one correspondence with a wire-type that defines the wire representation
of the type. You must supply routines to size the data for marshaling, to
marshal and unmarshal the data, and to free memory.
NOTE: If there are embedded types in your data that are also defined with
wire_marshal or user_marshal, you need to manage the servicing of those
embedded types as well.
CAUSE
An uninitialized (NULL) buffer pointer is dereferenced to see if the
underlying buffer was overwritten, causing an Access Violation.
RESOLUTIONTo resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the
Microsoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
STATUSMicrosoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.
| Modification Type: | Minor | Last Reviewed: | 9/23/2005 |
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| Keywords: | kbHotfixServer kbQFE kbAPI kbbug kbfix kbnetwork kbQFE kbRPC KB158516 |
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