Microsoft KB Archive/234541

= STOP 0x00000050 in IPXSendFrame When Source Routing Info Exceeds 18 Bytes =

Article ID: 234541

Article Last Modified on 11/1/2006



This article was previously published under Q234541



SYMPTOMS
A STOP 0x0000000A or STOP 0x000000050 error message may be displayed after a call to MacLookupSourceRouting when source routing information exceeds 18 bytes in length.



CAUSE
SourceRoutingBuffer is allocated as a UCHAR[18] on the stack. The 802.5 specification states that source routing can be up to 31 bytes in length. Originally, this length was 18 bytes to allow seven hops. Later, it was changed to 31 bytes. When MacLookupSourceRouting finds the media access control entry, it fills in the 31 bytes of Source Routing into the caller's parameters. This causes corruption in the stack.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0. 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

The latest service pack is also available at the following Internet location:

http://www.microsoft.com/windows/servicepacks/



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 5.

Keywords: kbbug kbfix kbqfe KB234541

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