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BOOK: Beginning VB.NET Databases
This is the forum to discuss the Wrox book Beginning VB.NET Databases by Thearon Willis; ISBN: 9780764568008
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Old August 27th, 2007, 08:14 AM
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Default JRO Replication Error

Hi guys,

Hope this is question is OK as it's vb.net and database related (although not in the book).

I wish to use replication in my app and so have gone into Access and created a Design Master and a Replica database. Now I want to programmatically synchronize the 2 tables (design master is copied to a local folder then synchronized with replica). Here's my code:

    Private Function SynchronizeDBs(ByVal strReplicaName As String, ByVal strSynchWith As String, _
    ByVal intSynchType As Integer, ByVal intSynchMode As Integer) As Boolean

        Dim bSuccess As Boolean = True
        Dim rep As New JRO.Replica

            rep.ActiveConnection = strReplicaName
            rep.Synchronize(strSynchWith, intSynchType, intSynchMode)
        Catch ex As Exception
            MessageBox.Show(ex.Message & vbCr & vbLf & "Please Report This Message", "Synchronize Error")
            bSuccess = False
            rep = Nothing
        End Try

        Return bSuccess

    End Function

and the calling function:

        If SynchronizeDBsJRO(UPDATE_PATH, PROG_PATH, 2, 2) = True Then
' more code
End If

UPDATE_PATH and PROG_PATH are strings defining the design master and replica databases respectively.

Every time I run the programme I receive the following error message:

    "Arguments are of the wrong type, are out of acceptable range, or are in conflict with one another."

On debugging, the Try Catch traps the error on the assignment of the
rep.ActiveConnection = strReplicaName line.

Can anyone tell me what I'm doing wrong please?



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Old August 28th, 2007, 03:53 AM
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After searching high and low, I've managed to sort out the problem myself.

Apparently the current version of ADO is out of sync (pardon the pun) with COM, therefore you have to use the method:


instead of:


See the following article:


The modified code is below (in bold):

    rep.Synchronize(strSynchWith, intSynchType, intSynchMode)
Catch ex As Exception
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