your New Ds Has No Data Inside it !! ( in the Crystal Report Code Part )
add this code
Dim cn As New SqlConnection("Data Source=.\INSTANCE;initial catalog=record;user=sa;password=gariahat")
Dim ds As New DataSet
Dim dt As DataTable
Dim cmd As New SqlCommand("select * from fullsort where return_dt is null ", cn)
Dim da As New SqlDataAdapter(cmd)
dt = New DataTable
da.Fill(dt)
FullsortDataGridView.DataSource = dt
cn.Close()
to Actually Load the Data to The Newly Created DS :)
That's Why there is an Error and No Data Appears