I walked the tutorial and made it step by step also I made my own program and made some BO-s UniversityBO, FacultyBO ... the UniversityBO at the FillTop100 method gives me an error

My code is this:



Public Sub FillTop100()



Me.FillDataTable("SELECT TOP 100 * FROM Universitate")



End Sub



The error is this One I mention that I followed the standard procedure in making BO and mapping data - yesterday it was working fine )



MicroFour.StrataFrame.Data.DataLayerException was unhandled

Message="An error occurred while creating a new DataLayer for the business object."

Source="MicroFour StrataFrame Business"

StackTrace:

at MicroFour.StrataFrame.Business.BusinessLayer.get__DataLayer()

at MicroFour.StrataFrame.Business.BusinessLayer.FillDataTable(String SelectStatement)

at ManagerUniversitate.UniversitateBO.FillTop100() in D:\5.MyDocuments\Visual Studio 2005\Projects\ManagerUniversitate\ManagerUniversitate\Libs\UniversitateBO.vb:line 69

at ManagerUniversitate.frmActualizareUniversitate.UniversitateBO1_ParentFormLoading() in D:\5.MyDocuments\Visual Studio 2005\Projects\ManagerUniversitate\ManagerUniversitate\Forms\frmActualizareUniversitate.vb:line 5

at MicroFour.StrataFrame.Business.BusinessLayer.raise_ParentFormLoading()

at MicroFour.StrataFrame.Business.BusinessLayer.OnParentFormLoading()

at MicroFour.StrataFrame.Business.BusinessLayer.RaiseParentFormLoadingEvent()

at MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.InitializeFormLoadObjects()

at MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.OnLoad(EventArgs e)

at System.Windows.Forms.Form.OnCreateControl()

at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)

at System.Windows.Forms.Control.CreateControl()

at System.Windows.Forms.Control.WmShowWindow(Message& m)

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

at System.Windows.Forms.ContainerControl.WndProc(Message& m)

at System.Windows.Forms.Form.WmShowWindow(Message& m)

at System.Windows.Forms.Form.WndProc(Message& m)

at System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m)

at System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m)

at System.Windows.Forms.Nativewindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)

at System.Windows.Forms.Control.SetVisibleCore(Boolean value)

at System.Windows.Forms.Form.SetVisibleCore(Boolean value)

at MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.SetVisibleCore(Boolean value)

at System.Windows.Forms.Control.Show()

at ManagerUniversitate.frmMainwindow.UniversitateToolStripMenuItem_Click(Object sender, EventArgs e) in D:\5.MyDocuments\Visual Studio 2005\Projects\ManagerUniversitate\ManagerUniversitate\Forms\frmMainwindow.vb:line 32

at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)

at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)

at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)

at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)

at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)

at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)

at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)

at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

at System.Windows.Forms.ToolStrip.WndProc(Message& m)

at System.Windows.Forms.MenuStrip.WndProc(Message& m)

at System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m)

at System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m)

at System.Windows.Forms.Nativewindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)

at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.Run(Form mainForm)

at ManagerUniversitate.frmMainwindow.Main() in D:\5.MyDocuments\Visual Studio 2005\Projects\ManagerUniversitate\ManagerUniversitate\Forms\frmMainwindow.Designer.vb:line 2

at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)

at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ThreadHelper.ThreadStart()