TIBCO Spotfire

Below is my full code. This allows to select a different excel file and changes the data in the Visualization

I am avoiding this code "FileTable = Application.Document.Data.Tables.Add(uniqueName, flow)" because of the error

In addition, how to handle if there are multiple Datatables?

import clr
import System
clr.AddReference("System.Windows.Forms")
from System.Windows.Forms import OpenFileDialog, MessageBox
from Spotfire.Dxp.Data import DataType, DataTable, DataFlowBuilder, DataFlow, DataSourcePromptMode
from Spotfire.Dxp.Data.Import import TextDataReaderSettings, TextFileDataSource

#GETS THE FILE PATH FROM THE USER THROUGH A FILE DIALOG
OpenFile = OpenFileDialog()
OpenFile.ShowDialog()
filename=OpenFile.FileName
MessageBox.Show(filename)
ds = Document.Data.CreateFileDataSource(filename)
dfb = DataFlowBuilder(ds, Application.ImportContext)
dfb.Execute(0, DataSourcePromptMode.RequiredOnly)
flow = dfb.Build()
DataTable = Document.Data.Tables["OTC"]
DataTable.ReplaceData(flow)

uniqueName = Application.Document.Data.Tables.CreateUniqueName("File Data Table")

Tks for sharing!

JC