Overflow Error in Microsoft Access Explained

In this Microsoft Access tutorial, I will show you how to troubleshoot and resolve the frustrating Overflow error, which can arise from a variety of issues including data type limits, complex queries, and system resources.

Rowan from Kirkland, Washington (a Platinum Member) asks: I have a database that's been working just fine for years. I haven't made any significant changes to it in the past few months. All of the sudden, every time it starts up, I get an "Overflow" error. It goes away, and the database continues to run smoothly after that. But the error is annoying, and I've tried for hours to hunt it down to no avail. Help!

Prerequisites

• Access Expert 1

Links

• Type Mismatch
• Troubleshooter
• Stock Portfolio

List of Causes

• Exceeding Data Type's Limit (Integer: 32,767)
• Data Type Mismatch (Comparing Int to Double)
• Div/0 Errors
• Queries With Overly Complex Calculations / Levels
• Loading Large Datasets into Memory (Giant Arrays)
• Linked Tables with Incompatible Data Types (SQL Server)
• Low System Resources

Steps to Resolve

• Run down Troubleshooter!
• Step through your code (breakpoints)
• Check all your field formulas (look for Div/0)
• Backup!
• Start deleting objects from the form
• When you find the object, check it's data source
• If necessary, delete objects (forms, etc.) until you find it

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Keywords

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