Probably using Access 2000.
For error 3343, have a look at these 2 articles:
http://support.microsoft.c
http://support.microsoft.c
For error 91, the problem will surely be solved if 3343 is fixed.
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Database connection problem
My Visual Basic application is using MS Access database and it is multi-user. Lately I encounter the following error message when stating the application:
1. Error #3343 was generated by DAO workspace unrecognized database format 'h:\brains.mdb'
2. Error #91 was generated by Project1 object variable or with block variable not set.
After repair the database the problem will solve. Why the database corrupted and what is the possible cause?
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Answers
I am using Windows NT to host MS Access 97 database but occasional the problem happen. So I move to Windows 2000, worst it happen everyday.
But I have found that my another application where the Access 97 is host on Windows 95 is working fine until now even with bigger size, so does it mean Access 97 will only work well on desktop such as Windows 9x/ME?
- Reveise the application itself and check that each module closes it's opbjects such as recordsets and the database object.
2- Have a look to the permissions especially in windows 2000.
3- Verify that all instances of the application use the same version of DAO.
4- Because the database gets corrupt frequently then no one may gain execlusive access to it so you can write an error handler code to catch the 3343 error number and repair the database then release then re-open it. You can but the repair code in a module to be called each time the database got corrupt. It's not an ultimate solution but something's better than nothing.
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by: TimCotteePosted on 2001-06-28 at 02:57:13ID: 6234598
Just one of those things that happens with access. Especially if you have a large (>5 users) accessing the database it is quite likely that it will be corrupted from time to time. Usually because of users abnormally terminating the connection or their transaction. You already have the one and only solution which is to repair the database. It may make sense to add some code to the application which on each user's exit of the application will attempt to obtain exclusive use of the database; if it does it can then automatically run the repair/compact code to assist in the maintenance of the database.
Access is not really the best solution for a multi-user database with a large number of users for this (and other) reasons. I would personally be considering upgrading to SQL server (either the desktop edition if you only have a few users) or the full scale version if it is a large number of users.