XADM: Information Store Loops While Processing Same DBCS Attachment Files

ID: Q195970

The information in this article applies to:

SYMPTOMS

The Microsoft Exchange information store may loop if a message contains multiple attachments with the same double-byte character set (DBCS) file name. This happens when you select the "Always send to this recipients in Microsoft Outlook rich-text format" option and the message is encoded with UUENCODE.


CAUSE

When the message contains multiple attachments with the same file name, the information store tries to make the name of the attachment unique by replacing the last byte with 0..9, A..Z. For example, name.txt, nam0.txt, .. nam9.txt, namA.txt, .. namZ.txt. If the last character of the attachment file name is an DBCS, only the trailing byte of it is replaced and this behavior causes the problem above.


RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait the next Microsoft Exchange Server version 5.0 or 5.5 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/support/supportnet/default.asp
The English version of this fix should have the following file attributes or later:
Component: Information Store 

   Version  5.0
   File Name    Version
   ------------------------
   Mdbmsg.dll   5.0.1461.76
   Store.exe    5.0.1461.76

   Version 5.5
   File Name    Version
   ------------------------
   Gapi32.dll   5.5.2505.00
   Mdbmsg.dll   5.5.2505.00
   Store.exe    5.5.2505.00

NOTE: If you contact Microsoft to obtain this fix, a fee may be charged. This fee is refundable if it is determined that you only require the fix you requested. However, this fee is non-refundable if you request additional technical support, if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:
Q154871 Determining If Your Product Is Eligible for No-Charge Technical Support


STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0 and 5.5.


MORE INFORMATION

When the information store is looping, the stack back trace will be similar to the following: 


FramePtr  RetAddr   Param1   Param2   Param3   Function Name
1296f454  7002d3ac  00142c90 00000000 0148f654 KERNEL32!SpecialMBToWC+0x201
1296f480  7002c38e  00142c90 00000000 0148f654
KERNEL32!NlsAnsiToUnicode+0xa3
1296f6c4  70012827  00000411 40000001 0148f654
KERNEL32!CompareStringA+0x1a5
1296f6ec  0063369b  0148f654 13cb770c 13cb7714 KERNEL32!lstrcmpiA+0x22
1296f70c  00633742  13cb770c 13c442bc 13cb770c STORE!CAttachList::
IsUniqueFileName+0x33
1296f728  00560eb0  00000008 13c442bc 001851a8 STORE!CAttachList::
hrMungeFileName+0x7b
1296f768  00536f23  13cb789c 13c45414 00000400 STORE!CmcvtrBptRFC1154::
hrEmitAttach+0x15c
1296f78c  0043cb9e  13cb7a0c 13c45414 00000400 STORE!CmcvtrBptRFC1154::
hrEmit+0x19c
1296f7b4  0043cadd  13c82b26 00002000 1296f840 STORE!CINETemtr::hrEmit+0x82
1296f7d4  00405c68  014bd898 13c51dc4 1296f81c
STORE!CConvertStream::Read+0x5b
1296f800  004ae291  13c8f6a4 13c82b26 00002000 STORE!MDB::PunkFromHsot+0x7e
1296f81c  004ae204  00002000 13c82b26 1296f840 STORE!EcReadStreamOp+0x4f
1296f840  00405521  00000000 0000004a 00143b94 STORE!EcReadStream+0x5e
0000004a  00000000  00000000 00000000 00000000 STORE!EcRpc+0x773

Additional query words: QFE CPU 100% 100 percent 


Keywords          : 
Version           : WinNT:5.0
Platform          : winnt 
Issue type        : kbbug

Last Reviewed: August 3, 1999