I have the following

Range("Z4:Z5").Select 'Copies blank cells to Country,CustomerPart NO &
Contacts Email input cell

Selection.Copy
Range("AD10").Select
Selection.PasteSpecial Paste:=xlPasteValues

Application.Goto Reference:="SubstrateStandard"
'This works where "SubstrateStandard" is cell Substrate1!S1

Sheets("Substrate1").Select
Range("S1").Select
'this will not work

Gives "Application-defined or object-defined error

oldjay