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Fix Microsoft Access ACCDE Form and Combo Box Not Working

Maira Mehtab Sep 22, 2026 869 views

Question details

The user needs to fix a combo box that fails to populate another form field automatically in an encrypted ACCDE front-end file after the database was split.

Product: Microsoft Access
Device & OS: not provided
Scenario: Running an encrypted ACCDE front-end database after splitting it from the original ACCDB file.
Observed behavior: A combo box on a form no longer populates a secondary form field (e.g., BoardType), which previously worked fine in the original uncompiled database.

Before you start

Before attempting to generate a new ACCDE file, open the VBA Editor in your original ACCDB file and select Debug > Compile Database to identify and resolve any underlying syntax errors.

Solution 1Recommended

Remove Empty Procedures and Implement Error Handling

Empty VBA procedures can cause silent compilation failures or unexpected behaviors in compiled ACCDE files. Removing them and adding error handling ensures the code executes correctly.

When an Access database is compiled into an ACCDE file, all readable VBA source code is removed, leaving only the compiled execution code. If the database contains empty event handlers or lacks error catching, forms may freeze or fail to trigger updates.

Open the VBA Editor

Open your original ACCDB file in Design View, and press Alt + F11 to open the Microsoft Visual Basic for Applications (VBA) Editor.

Locate and Delete Empty Procedures

Find the form's code module in the Project Explorer. Look for any empty event procedures (such as 'Add_another_board_Click') and delete them entirely.

Add Error Handling

Navigate to the 'SerialNumber_AfterUpdate' procedure and add standard VBA error handling ('On Error GoTo ErrorHandler') to catch and display any runtime issues.

Compile and Recreate ACCDE

Click 'Debug' > 'Compile Database' in the top menu. Save your changes, close the VBA editor, and go to File > Save As > Make ACCDE to generate a fresh, error-free front end.

Solution 2

Verify Control References in the AfterUpdate Event

Ensure that the VBA code correctly references the form controls and the specific columns of the combo box.

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Frequently Asked Questions

Why do combo boxes work in ACCDB but fail in ACCDE files?

An ACCDE file is a compiled version of the database where all VBA source code is removed. If there are minor compilation errors, missing references, or empty event procedures in the ACCDB file, the code will fail to execute in the strict ACCDE environment.

How do I populate a text box based on a combo box selection?

In the combo box's AfterUpdate event, use VBA to assign the value from a specific column to the text box. For example, 'Me.TextBoxName = Me.ComboBoxName.Column(1)'. Keep in mind that combo box column indexes in Access are zero-based.

Can I edit an ACCDE file directly to fix the form?

No, ACCDE files are locked and cannot be edited in Design View. You must make any form, query, or VBA code changes in the original ACCDB file, compile it, and then publish a new ACCDE file.

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