CAUSE
This problem occurs when the following conditions are true:
- You create a Microsoft Excel spreadsheet created through Automation.
-and-
- You type an Analysis ToolPak function in a cell in the workbook.
This problem occurs even if the Analysis ToolPak add-in was selected in the
Add-Ins dialog box during the previous session of Microsoft Excel.
When you use Automation to start the versions of Microsoft Excel listed at
the beginning of this article, the Analysis ToolPak add-in is not loaded
even if you previously loaded it or you loaded it by running a macro.
WORKAROUND
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.
To work around this problem, load the Analysis ToolPak. To do this, clear
the check box for the add-in in the Add-Ins dialog box in Microsoft Excel
or use code to unload it, and then use code to reload the add-in.
The following example is created in Visual Basic 4.0 and works with both
versions of Microsoft Excel listed at the beginning of this article. With
very little modification, you can use the code in Microsoft Access 97 and
Microsoft Word 97. The sample code creates a Microsoft Excel workbook and
places several Analysis ToolPak functions in cells. It does not make any
difference whether the Analysis ToolPak is selected in the last session of
Microsoft Excel. By using the Installed property of the AddIns class you
allow the Analysis ToolPak to be unloaded, and then loaded through code.
Sub Main()
' Declares all the variables to be used.
Dim xlApp As Object ' Will be used for the application object.
Dim xlWB As Object ' Will be used for the workbook object.
Dim xlsheet As Object ' Will be used for the spreadsheet object.
' Starts an instance of Microsoft Excel.
Set xlApp = CreateObject("excel.application")
' Makes Microsoft Excel visible.
xlApp.Visible = True
' Starts a new workbook.
xlApp.workbooks.Add Template:="Workbook"
' Unloads and loads the Analysis Toolpak.
xlApp.AddIns("Analysis ToolPak").Installed = False
xlApp.AddIns("Analysis ToolPak").Installed = True
' Assigns the variables to their respective objects.
Set xlWB = xlApp.ActiveWorkbook
Set xlsheet = xlWB.activesheet
' Assigns formulas to cells on the spreadsheet.
With xlsheet
.Activate
.range("A1").Formula = "1/1/97"
.range("A2").Formula = "7/14/97"
.range("A3").Formula = "=EDATE(R[-2]C,2)"
.range("A4").Formula = "=EOMONTH(R[-3]C,3)"
.range("A5").Formula = "=NETWORKDAYS(R[-4]C,R[-3]C,2)"
End With
' Saves the file.
xlApp.ActiveWorkbook.SaveAs filename:="C:\OLEtest.xls"
' Closes Microsoft Excel.
xlApp.quit
' Clears the variables
Set xlsheet = Nothing
Set xlWB = Nothing
Set xlApp = Nothing
End Sub
Open the Oletest.xls file to verify that values in cells A3:A5 are
calculated without error.