ACC: "Undefined Function in Expression" Error Message

• Microsoft Access versions 2.0, 7.0, 97

SYMPTOMS

Moderate: Requires basic macro, coding, and interoperability skills.

When you call a user-defined function from within an aggregate (totals) function, such as the Sum() function, in a report, you may receive the following error message:

Undefined function '<function name>' in expression.

CAUSE

The user-defined function is located in the report module.

RESOLUTION

Transfer the user-defined function from the report module to a global module.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Access versions 2.0, 7.0, and 97.

MORE INFORMATION

Steps to Reproduce Problem

1. Open the sample database Northwind.mdb (or NWIND.MDB in Microsoft Access 2.0).



2. Open the Alphabetical List Of Products report in Design view.



3. Add a text box with the following property to both the detail section and the Product Name footer section of the report:
   

   
         ControlSource: =Sum(Notwork()) 




4. On the View menu, click Code.



5. Enter the following user-defined function in the report module:
   

   
         Function Notwork()
            Notwork=8
         End function 




6. Close the report module.



7. Preview the report. Note that you receive the error message described earlier in this article.

REFERENCES

For more information about creating modules, search for "module," and then "Creating" using the Microsoft Access 97 Help index.

Keywords          : kberrmsg 
Version           : 2.0 7.0 97
Platform          : WINDOWS 
Issue type        : kbbug 

Last Reviewed: April 7, 1999