Run code when open file

[zaasrvr]

I need run this code when the file is opening:

Sub Remove_Formula_Errors()
Dim rng As Range, cell As Range, fmla As String
Set rng = Cells.SpecialCells(xlCellTypeFormulas, 16)
For Each cell In rng
fmla = Right(cell.Formula, Len(cell.Formula) - 1)
cell.Formula = "=if(iserror(" & fmla & "), """"," & fmla & ")"
Next
End Sub

Any idea?

Thanks