Re, bonjour frangy
cCe n'est pas très propre, mais bien placé le Resume Next fonctionne
Sub export2()
Dim c As Long, l As Long, Tmp As Variant
l = Range("F65536").End(xlUp).Row
c = Range("IV1").End(xlToLeft).Column
For i = 2 To l
On Error Resume Next
Tmp = Split(Cells(i, c).Value, "/")
Cells(i, c + 1).Value = DateSerial(Tmp(2), Tmp(1), Tmp(0))
Next
End Sub
Cordialement
EDIT
Quitte à gérer les erreurs autant que l'on s'en serve
Sub export2()
Dim c As Long, l As Long, Tmp As Variant
l = Range("F65536").End(xlUp).Row
c = Range("IV1").End(xlToLeft).Column
For i = 2 To l
On Error Resume Next
Tmp = Split(Cells(i, c).Value, "/")
Cells(i, c + 1).Value = DateSerial(Tmp(2), Tmp(1), Tmp(0))
If Err Then
Err.Clear
Cells(i, c + 1).Interior.ColorIndex = 3
End If
Next
End Sub