主题：表空时加载出错，不知如何解决？

.NET Framework 版本：2.0.50727.5485

Foxtable 版本：2014.10.16.1

错误所在事件：窗口,监造周报窗口,AfterLoad

详细错误信息：

未将对象引用设置到对象的实例。

参照前面甜版和高手的指导，我依葫芦画瓢在AfterLoad中加了两个IF语句，整个AfterLoad代码如下：

但是修改后的代码在运行时发现大量占用内存，要等很长时间才能进入系统，但是没有报错。试着在表中维护数据，发现凡是在加载时表不为空，启动速度正常，但一旦为空，速度就非常慢。请高手看看我的代码是不是有缺陷？谢谢了！

If User.Group = "监理" Then

    DataTables("监造周报").LoadFilter = "监理人员 = '" & User.Name & "'"

ElseIf User.Group = "主管" Then

    DataTables("监造周报").LoadFilter = "项目经理 = '" & User.Name & "'"

Else

    DataTables("监造周报").LoadFilter = ""

End If

DataTables("监造周报").Load()

If Forms("监造周报窗口").Opened Then

    'If Tables("监造周报").Current("审核") IsNot Nothing  Then

    If Tables("监造周报").Current IsNot Nothing Then

        Dim fm1 As WinForm.FileManager = Forms("监造周报窗口").Controls("FileManager1")

        Dim fm2 As WinForm.FileManager = Forms("监造周报窗口").Controls("FileManager2")

        Dim fm3 As WinForm.FileManager = Forms("监造周报窗口").Controls("FileManager3")

        Dim fm As WinForm.PictureViewer = Forms("监造周报窗口").Controls("PictureViewer1")

        If Tables("监造周报").Current.IsNull("审核") = False  Then '如果周报已经审批

            fm1.AddCommand.Visible = False

            fm2.AddCommand.Visible = False

            fm3.AddCommand.Visible = False

            fm.AddCommand.Visible = False

            fm1.DeleteCommand.Visible = False

            fm2.DeleteCommand.Visible = False

            fm3.DeleteCommand.Visible = False

            fm.DeleteCommand.Visible = False

            fm1.ClearCommand.Visible = False

            fm2.ClearCommand.Visible = False

            fm3.ClearCommand.Visible = False

            fm.ClearCommand.Visible = False

            fm.ManagerCommand.Visible = False

            fm1.ManagerCommand.Visible = False

            fm2.ManagerCommand.Visible = False

            fm3.ManagerCommand.Visible = False

        Else

            fm1.AddCommand.Visible = True

            fm2.AddCommand.Visible = True

            fm3.AddCommand.Visible = True

            fm.AddCommand.Visible = True

            fm1.DeleteCommand.Visible = True

            fm2.DeleteCommand.Visible = True

            fm3.DeleteCommand.Visible = True

            fm.DeleteCommand.Visible = True

            fm.ManagerCommand.Visible = False

            fm1.ManagerCommand.Visible = False

            fm2.ManagerCommand.Visible = False

            fm3.ManagerCommand.Visible = False

        End If

    End If

End If