I am trying to edit the part dimension in CATIA by changing the dimension values in the design table in the excel file. Everytime when i change the values i should manually update the part model. I want to update it automatically through VBA code and save it.

I tried 

```html
Sub CATMain()
CATIA.DisplayFileAlerts = False
Dim part As PartDocument
Set part = CATIA.ActiveDocument
part.Update
part.SaveAs "D:\E\CSE\.....\Part2.CATPart"
End Sub
```

and it is not working.
How can we update and save it??