Microsoft KB Archive/249350

Knowledge Base

FIX: Error Messages "Change Canceled During Notification..." (MDAC 2.1) or "Operation Was Canceled" (MDAC 2.5)

Article ID: 249350

Article Last Modified on 4/29/2007

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APPLIES TO

• Microsoft ActiveX Data Objects 2.1
• Microsoft ActiveX Data Objects 2.1 Service Pack 1
• Microsoft ActiveX Data Objects 2.1 Service Pack 2
• Microsoft ActiveX Data Objects 2.5
• Microsoft OLE DB Provider for Jet 3.51
• Microsoft OLE DB Provider for Jet 4.0
• Microsoft Visual Basic 6.0 Professional Edition
• Microsoft Visual Basic 6.0 Enterprise Edition

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This article was previously published under Q249350

SYMPTOMS

The following error messages occur:

Change canceled during notification, no columns changed (MDAC 2.1)

-or-

Run-time error '-2147217842(80040e4e) Operation was canceled (MDAC 2.5 and later)

This problem occurs with the Jet Provider and does not occur with the SQL Server Provider. The problem also does not reproduce with client-side cursors.

The problem doesn't seem to be in the ADODC itself, because you can bind the controls directly to a Recordset object and click on a MoveNext command button to cause the problem.

RESOLUTION

The resolution is to issue a Recordset.Move 0 method in one of the events in the TextBox control.

STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article. This bug was corrected in the latest service pack for Visual Studio 6.0.

For additional information about Visual Studio service packs, click the following article numbers to view the articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

194295 How to tell that a Visual Studio service pack is installed

To download the latest Visual Studio service pack, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/vstudio/aa718359.aspx/

MORE INFORMATION

Steps to Reproduce Behavior

1. Create a new project and add the ADO Data control and the DataGrid (OLE DB) control to the components.
2. Add a TextBox, a DataGrid, a CommandButton, and an ADO Data control to the form.
3. Set the connection string on the ADO Data control to use the JET 4.0 OLEDB provider and then choose the Northwind database.

4. Add the following code to the project:

       Dim rs As ADODB.Recordset
   Private Sub Form_Load()
   
       Set rs = New ADODB.Recordset
       rs.CursorLocation = adUseServer
       rs.ActiveConnection = Adodc1.ConnectionString
       rs.Properties("IRowsetIdentity") = True
       rs.Open "SELECT * FROM Customers", _
               , adOpenKeyset, adLockOptimistic, adCmdText
       Set Adodc1.Recordset = rs
       Set DataGrid1.DataSource = Adodc1
       Text1.DataField = "CompanyName"
       Set Text1.DataSource = Adodc1
   End Sub
   Private Sub Command1_Click()
   rs.MoveNext
   
   End Sub
                       

5. Run the program.
6. In the Grid, select an entire row about four lines down. Be sure to click on the Button column on the left so that you select the entire row.
7. Edit the text in the TextBox (not in the Grid).
8. In the Grid, select another entire row about four more lines down.
9. Edit the text in the TextBox.
10. Click on the Move Next button, and note that you get the error messages listed in the "Symptoms" section of this article.

Keywords: kbbug kbdatabase kbfix kbjet kbmdacnosweep kbvs600sp4fix kbvs600sp5fix KB249350

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