If you try to create an MDE file from a Microsoft Access database (.mdb) or an add-in (.mda) (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) that references another Access database or add-in, Access displays an error message and doesn't let you complete the operation. To save a database that references another database as an MDE file, you must save all databases in the chain of references as MDE files, starting from the first database referenced. After saving the first database as an MDE file, you must then update the reference in the next database to point to the new MDE file before saving it as an MDE file, and so on.
For example, if Database1.mdb references Database2.mdb, which references Database3.mda, you would proceed as follows:
Save Database3.mda as Database3.mde.
Open Database 2.mdb, and change its reference to point to the new Database3.mde.
Save Database2.mdb as Database2.mde.
Open Database1.mdb, and change its reference to point to the new Database2.mde.
Save Database1.mdb as Database1.mde.
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