Article ID: 177634 - View products that this article applies to.
This article was previously published under Q177634
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In Microsoft Excel 97, when you programmatically add sheets to a workbook, you may receive one of the following error messages:
If you click Details, you receive an error message similar to the following:
This program has performed an illegal operation and will be shut down. If the problem persists, contact the program vendor.
EXCEL caused an invalid page fault in module MSO97.DLL at 0137:30705766.
EXCEL caused an invalid page fault in module EXCEL.EXE at 015f:3023ab75
and then Excel quits.
An application error has occurred and an application log is being generated.
Exception: access violation(0xc0000005), Address: 0x307de830
Run-time error '1004': Copy method of Worksheet class failed
This problem may occur when you use a looping statement to copy a worksheet over and over. For an example of this problem, please see the "More Information" section of this article.
Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals 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 needs.
If you have limited programming experience, you may want to contact a Microsoft Certified Partner or Microsoft Advisory Services. For more information, visit these Microsoft Web sites:
Microsoft Certified Partners - https://partner.microsoft.com/global/30000104
Microsoft Advisory Services - http://support.microsoft.com/gp/advisoryservice
For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS
(http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS)To work around this problem, try using code similar to the following to copy worksheets:
Microsoft has confirmed this to be a problem in Microsoft Excel 97. This problem no longer occurs in Microsoft Excel 2000.
This problem occurs because each time you copy the same sheet a codename is assigned to the copy, and each time the sheet is copied, that codename becomes longer. For example, if you copy sheet1 once, the codename assigned to the sheet is sheet11. When you copy the sheet again, it is assigned sheet111, and so on. The codename has a maximum number of about 35 characters. When this limit is reached, Excel stops responding.
Example of the problemNOTE: This example may cause Excel to stop responding. Please use with discretion.
For more information about the CodeName property, from the Visual Basic Editor, click the Office Assistant, type codename property, click Search, and then click to view "CodeName property."