Microsoft KB Archive/195970

= XADM: Information Store Loops While Processing Same DBCS Attachment Files =

Article ID: 195970

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.0 Standard Edition
 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q195970





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.



Exchange Server 5.5
To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

Component: Information Store

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

Exchange Server 5.0
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft Exchange Server 5.0 that contains this hotfix.

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 about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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



STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0 and 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.



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: kbhotfixserver kbqfe kbbug kbexchange500presp3fix kbfix KB195970

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