Crystal Report: Failed to enable constraints. One or more rows contain values

Hi vbforums users!!

I have the following code:

Code:

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  Dim rpt As New rptInvoice() 'Crear nuevo reporte
        Dim myConnection As MySqlConnection
        Dim MyCommand As New MySqlCommand()
        Dim myDA As New MySqlDataAdapter()
        Dim myDS As New timetracking2DataSet 'Dataset a modificar



        myConnection = New MySqlConnection("Data Source=xxxxx;Database=xxxxx;User ID=xxxx;Password=xxxxx;")
        MyCommand.Connection = myConnection
        'MyCommand.CommandText = "SELECT * FROM  BillInfo INNER JOIN ProductSold ON BillInfo.InvoiceNo = ProductSold.InvoiceNo INNER JOIN Customer ON BillInfo.CustomerNo = Customer.CustomerNo WHERE billinfo.invoiceno= '" & frmSales.txtInvoiceNo.Text & "'"
        MyCommand.CommandText = "SELECT * FROM  BillInfo INNER JOIN ProductSold ON BillInfo.InvoiceNo = ProductSold.InvoiceNo INNER JOIN Customer ON BillInfo.CustomerNo = Customer.CustomerNo WHERE billinfo.invoiceno= '" & frmSales.txtInvoiceNo.Text & "'"
        MyCommand.CommandType = CommandType.Text
        myDA.SelectCommand = MyCommand
        myDA.Fill(myDS, "BillInfo")
        myDA.Fill(myDS, "productsold")
        'myDA.Fill(myDS, "customer")

        rpt.SetDataSource(myDS)
        CrystalReportViewer1.ReportSource = rpt
        CrystalReportViewer1.RefreshReport()
        CrystalReportViewer1.Show()

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in the field:

Code:

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myDA.Fill(myDS, "productsold")

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works great, but in the other 2 cases:

Code:

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myDA.Fill(myDS, "BillInfo")

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and

Code:

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  myDA.Fill(myDS, "customer")

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say me that Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.

My database in

Code:

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myDA.Fill(myDS, "productsold")

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wont have Primary Key, but in the other 2 cases I have a primary Key.. any idea to fix this? :(

I have VisualStudio 2010 + MySQL
Best Regards!!

This has nothing to do with Crystal Reports. You should ask this question in VB .Net forum. That being said, the error message states what the problem is in general terms.

Quote:

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One or more rows contain values violating non-null, unique, or foreign-key constraints.

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You need to check you tables for any of those problems. Look at what relations are setup between those tables. Check if there are any records in the child table that don't have a foreign key match in the parent table.