XL97: Calculation Problems with Arrays in Custom FunctionsLast reviewed: February 27, 1998Article ID: Q163542 |
The information in this article applies to:
SYMPTOMSWhen you use a custom function in a workbook, the function may return incorrect values. Recalculating the workbook may also take longer than it does in earlier versions of Microsoft Excel.
CAUSEThis problem occurs when the following conditions are true:
WORKAROUNDMicrosoft 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 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 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/default.aspTo work around this problem, follow these steps:
STATUSMicrosoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was corrected in Microsoft Excel for Windows, Service Release 1, and in Microsoft Excel 98 Macintosh Edition.
MORE INFORMATIONArrays in Microsoft Excel 97 are recalculated <n> times, where <n> is the number of elements in the array. In earlier versions of Microsoft Excel, the array function is recalculated only once. Therefore, the number of elements in the array is directly proportional to the decrease in performance when the array is recalculated. Depending on the calculations Microsoft Excel performs in the custom function, incorrect values may be returned. For example, an incorrect value is returned if the function increments a counter and uses the counter value as part of a calculation.
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Additional query words: 97 XL97
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