Last Updated: Aug 14, 2019
We have been able to gather additional data about the causes of this issue, which are due to usage patterns in the Access Database Engine with networked files that did not cause issues with previous versions of Windows, but no longer work properly.
April 4 update: We are testing a fix for this problem now and will give further updates when we can confirm that this resolves the issue.
July 1 update: We have been testing a fix for this issue but have discovered problems as currently written. We are working to resolve these issues and will then engage in further testing.
Due to the complexity of this issue and the need to ensure that we aren't introducing any additional problems, the release process for this issue will span more time than a typical fix. Please continue to monitor this page for further updates.
When opening a database, you may see the following error message:
"Microsoft Access has detected that this database is in an inconsistent state, and will attempt to recover the database."
If using DAO to open a database from Visual Basic code, you may see error 3343 “Unrecognized database format” reported.
This may happen when you have a database stored on a network file share, and multiple users are using the database simultaneously.
The engineering team is aware of and working to fix this issue. In the meantime, disable the leasing on the machine where the shared database is stored as a workaround.
Single file database
The leasing change is made on the machine where the database is stored.
When using a split database scenario, where each user has their own copy of the front-end database stored on their client machine and a shared back-end database on a file server, the leasing change only needs to be made on the machine hosting the back-end database, no changes are needed to each user's client machine.
To do this:
Click Windows Start and then type Command. Right-click on Command Prompt and choose Run as administrator.
Copy and paste the following commands into the command prompt window:
REG ADD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters /v DisableLeasing /t REG_DWORD /d 1 /f
NET STOP SERVER
NET START SERVER
Close the command prompt window.
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