Application.ScreenUpdating = False
With Sheets("Sheet1").[A1:BI60000]
.FormulaArray = "='" & chemin & "[" & fichier & "]Source'!A1:BI60000" 'formule de liaison matricielle
tablo = .Value 'matrice, plus rapide
ncol = UBound(tablo, 2)
For i = 1 To UBound(tablo)
For j = 1 To ncol
If tablo(i, j) = 0 Then tablo(i, j) = ""
Next j, i
.Value = tablo 'restitution des valeurs
With .Parent.UsedRange: End With 'actualise les barres de défilement
End With