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Fix Microsoft Access Runtime Error 3078

Maira Mehtab Sep 21, 2026 868 views

Question details

The user is attempting to resolve Runtime Error 3078 in Microsoft Access 365, which occurs when trying to open a recordset.

Product: Microsoft Access 365
Device & OS: not provided
Scenario: Opening a database recordset that has functioned properly for 11 years.
Observed behavior: Access displays runtime error 3078 despite correct table names and SQL strings. Performing a Compact and Repair does not resolve the issue, and the Shift key fails to bypass the AutoExec macro.

Before you start

Before attempting to modify VBA code or database properties, ensure that all users are completely disconnected from the database and create a secure backup copy to prevent accidental data loss.

Solution 1Recommended

Review the Complete VBA Procedure and SQL Statement

Investigate the entire VBA code and SQL syntax, as the root cause of the error often lies in unexamined portions of the procedure.

Open VBA Editor

Launch Microsoft Access and press Alt + F11 to open the Visual Basic for Applications (VBA) editor.

Locate Trigger Code

Navigate to the specific module or form code that attempts to open the recordset and triggers the Runtime Error 3078.

Inspect Omitted Code

Thoroughly review the complete SQL string and the surrounding VBA procedure. Ensure there are no hidden syntax errors, misspelled object names, or invalid references in the previously unexamined parts of the code.

Debug the Procedure

Use the debugging tool by pressing F8 to step through the code line by line, which helps pinpoint the exact error context and the line failing to recognize the table or query.

Solution 2

Check for Access Version and Build Bugs

Determine if your current Access 365 build has known bugs related to table or database recognition that trigger false runtime errors.

Solution 3

Enable the Shift Key Bypass Option

Use a specialized utility to reset the AllowBypassKey property, allowing you to bypass the AutoExec macro and access the database structure.

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Frequently Asked Questions

What does Runtime Error 3078 mean in Microsoft Access?

Runtime Error 3078 indicates that Microsoft Access cannot find the input table or query specified in your code or macro. This typically happens if the object name is misspelled, deleted, or if there is a syntax error in the SQL string calling the object.

Why isn't Compact and Repair fixing the Access 3078 error?

The Compact and Repair tool is designed to resolve database corruption, index issues, and file bloat. It cannot fix structural code issues, missing tables, invalid SQL statements, or bugs inherent to a specific Microsoft Access build. You must troubleshoot the VBA code directly.

How can I bypass the AutoExec macro if the Shift key doesn't work?

If holding the Shift key does not bypass the startup routines, it means the database's 'AllowBypassKey' property has been set to False. You can bypass this by using an external VBA script or an Enable/Disable ShiftKey utility to reset the property back to True.

Can a Windows or Office update cause Access Runtime Errors?

Yes, certain Microsoft Office updates can introduce regression bugs that affect how Access handles database files, tables, and external links. Checking your current Access build against Microsoft's known issues documentation can help determine if a recent update is the culprit.

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