Microsoft KB Archive/182104

= WD98: Cannot Trap Undefined Sub or Function Error =

Article ID: 182104

Article Last Modified on 7/13/2007

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APPLIES TO


 * Microsoft Word 98 for Macintosh

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This article was previously published under Q182104





SUMMARY
In Visual Basic for Applications, you cannot trap the following "undefined Sub MyMacro     On Error Resume Next      x = MyFunction   End Sub



MORE INFORMATION
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements. An undefined Sub or Function is an attempt to call a Sub procedure or Function that does not exist.

The following sample Visual Basic for Applications macro makes a call to the non-existent function, "MyFunction". The error listed earlier in this article will occur before the macro begins to run or compile. Sub MyMacro On Error Resume Next x = MyFunction End Sub Error trapping does not work with undefined subroutines, functions, or commands. To avoid these type errors, the macro must be designed so that it does not call an undefined subroutine, function, or command. Specifically, when you create your macro make sure that the following conditions are satisfied:


 * The Sub procedure or Function exists.
 * The Sub procedure or Function is not misspelled.
 * The Sub procedure or Function is not declared as Private.
 * If the Sub procedure or Function exists in a custom template or document project other than the project in which the calling routine exists, make sure that a reference has been added to the custom template project or document.

NOTE: You cannot add a reference to a project within a document whose underlying template is the same template as the calling procedure.

Adding a Project Reference
To add a project reference, follow these steps:


 * 1) On the Tools menu, click References to display the References dialog box.
 * 2) The References dialog box shows all object libraries and projects registered with the operating system. Scroll through the list for the project you want to reference. If the template or document project isn't listed, you can use the Browse button to search *.dot or *.doc files. References whose check boxes are selected are used by your project; those that aren't selected are not used, but can be added.
 * 3) Select the Project reference in the Available References box in the References dialog box and click OK.

NOTE: If a project has not been saved, it appears as "UNSAVED: " and you will be unable to make a reference to it.

For more information about adding references, click the Office Assistant, while in the Visual Basic Editor, type Adding References, click Search, and then click to view "Check or Add an Object Library Reference."

NOTE: If the Assistant is hidden, click the Office Assistant button on the Standard toolbar. If the Assistant is not able to answer your query, please see the following article in the Microsoft Knowledge Base:

176476 OFF: Office Assistant Not Answering Visual Basic Questions

