Error in Microsoft Access 2007 When Saving an ACCDB Database to MDB
Written by Luke Chung,
It seems so simple and you've done it many times before. You have a
Microsoft Access ACCDB database (from MS Access 2007, 2010 or 2013) and want to save
it (convert it) to a Microsoft Access MDB format database so it can be used
by MS Access 2003 or earlier:
Unfortunately, when you try this in Microsoft Access 2007, this
error message appears:
You cannot save this database in an earlier version format, because it
uses features that require the current file format
This could occur if you added new features of MS Access 2007, 2010, or
instance, tables with the new multi-value or attachment field types. In
those cases, you wouldn't expect to convert the database to an MDB. So you
check and verify that none of your tables have these field types and you
still have this problem which doesn't explain what features you're using
which require the new format.
It turns out this error can still occur even if you didn't add new ACCDB features. What's going on?
Problem: Microsoft Access 2010 or 2013 Adds the MsysResources Table
This problem occurs if the database was opened with Microsoft
Access 2010 or 2013. MS Access 2010/2013 stores themes in an attachment field in the MsysResources table, and MDBs don't support attachment field types. So even
though you didn't add this incompatible field type to your Access database,
MS Access 2007 sees this table and field, and concludes the database can't be converted.
Solution: Delete the MsysResources Table
It wasn't easy figuring out the cause of the problem. Fortunately, the
solution is very simple.
From MS Access 2007, manually delete the MsysResources table, then save the
ACCDB as an MDB.
If you're in MS Access 2010 or 2013, you can simply save the ACCDB as an MDB because
Access 2010 and 2013 remove the table automatically in the conversion process.
Hope this helps. Good luck!