XL: Error Setting Type Property of Trendline with Macro

ID: Q172262

The information in this article applies to:

Microsoft Excel 97 for Windows
Microsoft Excel for Windows 95, versions 7.0, 7.0a
Microsoft Excel for Windows, versions 5.0, 5.0c

SYMPTOMS

In the versions of Microsoft Excel listed above, if you run a Visual Basic for Applications macro that sets the Type property of a trendline in a chart, you may receive the following error message:

   This program has performed an illegal operation and will be shut down.
   If the problem persists, contact the program vendor.

If you click Details, you receive an error message similar to either of the following:

   EXCEL caused an invalid page fault in module EXCEL.EXE at
   0137:30365bcf.

    -or-

   EXCEL caused a general protection fault in module EXCEL.EXE at
   00eb:00004464.

CAUSE

This problem occurs when the Name property of the trendline is empty (""). For example, the following line of code makes the Name property of a trendline empty:

   ActiveChart.SeriesCollection(1).Trendlines(1).Name = ""

WORKAROUND

To work around this problem, make sure that each trendline in the chart has a non-empty Name property before you attempt to change its Type property.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

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 the Microsoft fee-based consulting line at (800) 936-5200. For more information about the support options available from Microsoft, please see the following page on the World Wide Web:

   http://www.microsoft.com/support/supportnet/refguide/

In Excel, you can change the Type property of a trendline with a line of code similar to the following

   ActiveChart.SeriesCollection(1).Trendlines(1).Type = <type>

where <type> is one of the following xlConstants:

   xlExponential   xlMovingAvg
   xlLinear        xlPolynomial
   xlLogarithmic   xlPower

Additional query words: XL97 XL7 XL5 ipf gpf

Keywords          : kbprg kbdta kbdtacode KbVBA xlchart 
Version           : WINDOWS:5.0,5.0c,7.0,7.0a,97
Platform          : WINDOWS
Issue type        : kbbug

Last Reviewed: May 18, 1999