I might be able to help, but I'll need more information.
I'm assuming these maps are tables in an Access database. Right?
Are any of the tables linked tables? Or are they all local? (Linked tables will have an arrow just to the left of the table icon.)
If the table that can't be found is a linked table and you moved everything to another computer then you may get this error if the path to the new location isn't exactly the same. Access doesn't use relative paths to linked tables. It's all absolulte. So if the old table was located in C:\documents\access\db1.mdb then you move the database to C:\documents\access\new\db1.mdb, you get the error you posted.
In this case you have to relink the table. You do this by opening Tools -> Database Utilities -> Linked table manager. Select the table you want to relink, select Always prompt for new location and click on OK. You'll be given a dialog box to find the new table.
The table must also have the exact same name or the link will fail. (You can rename a linked table, but not the local table.) If the name of the table changed you'll just have to change it back or link it in again and delete the old linked table.
If you mouse over a linked table you can see the path and table name (if the linked table has a different name than the original) Access is expecting to find it.
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