DOCUMENT:Q182085 12-JUL-2000 [exchange] TITLE :XCON: MTA Fails with 9405 Error Queue-Desc-Object (ID1) PRODUCT :Microsoft Exchange PROD/VER:winnt:4.0,5.0,5.5 OPER/SYS: KEYWORDS:kbusage ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 ------------------------------------------------------------------------------- SYMPTOMS ======== When you try to start the Microsoft Exchange Message Transfer Agent (MTA), the service may fail to start and the following error message appears in the Windows NT Application Log: Event ID: 9405 Source: MSExchangeMTA Type: Error Category: Field Engineering An unexpected error has occurred which may cause the MTA to terminate. Error: Queue-Desc-Object (ID 1) not found. [BASE MAIN BASE 1] (16) Additionally, running MTACHECK against the \mtadata directory will fail with a similar error message: Error in Queue-Desc-Object (ID 1) initialization Database contains serious errors and cannot be automatically repaired. CAUSE ===== This error occurs when the file DB000001.DAT is missing from the exchsrvr\mtadata directory on the affected Exchange Server computer. Reasons for this file being lost are usually user intervention, file corruption, or hard disk corruption. This results in Windows NT automatically running a CHKDSK during the next startup and the corrupt file being deleted. WORKAROUND ========== The MTADATA directory needs to be rebuilt. Consult the following Microsoft Knowledge Base article on rebuilding the MTADATA directory: Q162384 XCON: How to Troubleshoot MTA Starting Failures MORE INFORMATION ================ Because DB000001.DAT is one of the MTA core static data files, it cannot just be copied from the Exchange Server CD-ROM. If DB000001.DAT is copied from the Exchange Server CD-ROM and the MTA is restarted, message data loss may occur. Additional query words: exception emsmta dat ====================================================================== Keywords : kbusage Technology : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2 Version : winnt:4.0,5.0,5.5 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.