This article was previously published under Q191922
This article has been archived. It is offered "as is" and will no longer be updated.
When a you try to run Jetpack.exe on the Jet database of a Dynamic HostConfiguration Protocol (DHCP) server on a computer running Windows NTServer version 4.0, you may receive the following error message:
Jetpack failed with error = -1605
When compacting the database using Jetpack, a Jet database duplicate keyerror -1605 may occur. This error occurs when addresses are marked bad anda unique value is not used for the media access control hardware addressassociated with the bad IP addresses.
This problem may go away temporarily if you delete the database andreconcile. This problem may also result in the DHCP server ceasing torespond (hanging).
To 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 theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Microsoft 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.
For additional information, please see the following article in the Microsoft Knowledge Base:
188027 Performance, Audit Logging, and Fixes to the DHCP Service