Error Setting Type Property of Trendline with Macro (172262)


The information in this article applies to:

  • Microsoft Excel 97 for Windows
  • Microsoft Excel for Windows 95
  • Microsoft Excel for Windows 5.0
This article was previously published under Q172262

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. 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. 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
Modification Type:MinorLast Reviewed:8/17/2005
Keywords:kbbug kbdtacode kbProgramming KB172262
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