Microsoft KB Archive/247029

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Article ID: 247029

Article Last Modified on 5/17/2007


  • Microsoft Data Access Components 2.1 Service Pack 2
  • Microsoft Data Access Components 2.1
  • Microsoft Data Access Components 2.1 Service Pack 2
  • Microsoft Data Access Components 2.1 Service Pack 1

This article was previously published under Q247029


Using MDAC 2.1 SP2 (build or earlier, when attempting to assign an ADO recordset field with Numeric data type to a second recordset field (for example, rs2!K2 = rs1!K1), the following error appears:

Run-time error '-2147217887 (80040e21)':
Error occurred.

This problem is observed when client side cursor is specified (adUseClient).


There are three ways to work around this problem:

  1. Use Server-side cursor (adUseServer).
  2. Assign field value to a variable, and then assign the variable to the field of the second recordset, such as:

    myVar = rs1!K1
    rs2!K2 = myVar
  3. Use the .Value property of the Column object, such as:

    rs2("K2").Value = rs1("K1").Value


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 Microsoft Data Access Components version 2.5 or later. You can obtain the latest version of Microsoft Data Access Components form the following Microsoft Web site:


Steps to Reproduce Behavior

  1. Start a new Standard EXE project in Visual Basic. Form1 is created by default. Make a reference to the Microsoft ActiveX Data Objects 2.1 Library.
  2. Double-click Form1. Copy and paste the following code under the Form_Load() event:

        Dim cn As New ADODB.Connection
        Dim rs1 As New ADODB.Recordset
        Dim rs2 As New ADODB.Recordset
        With cn
          .ConnectionString = "Provider=MSDASQL;Driver={SQL Server};UID=xxx;PWD=xxx;Server=MyServer;Database=Pubs;"
           .CursorLocation = adUseClient
        End With
        On Error Resume Next
        cn.Execute "Drop Table T1"
        cn.Execute "Drop Table T2"
        On Error GoTo 0
        cn.Execute "Create Table T1 (K1 Numeric Primary Key)"
        cn.Execute "Create Table T2 (K2 Numeric Primary Key)"
        cn.Execute "Insert Into T1 Values (1)"
        cn.Execute "Insert Into T2 Values (1)"
        rs1.Open "SELECT * FROM T1", cn, adOpenKeyset, adLockOptimistic
        rs2.Open "SELECT * FROM T2", cn, adOpenKeyset, adLockOptimistic
        rs2!K2 = rs1!K1


For additional information about MDAC release history, click the article number below to view the article in the Microsoft Knowledge Base:

231943 NFO: Microsoft Data Access Components (MDAC) Release History

Keywords: kbbug kbfix kbmdac250fix kbdatabase KB247029