I\'ve got a very simple procedure that copies a range from one workbook and pastes it into another; the issue is, I\'m getting the error in the title on the paste
The problem with your original code was two-fold.
The Cells.Delete statement appeared after the copy, but a delete action clears the clipboard.
The Paste method is a member of the Sheet object, not the Range object.
Adjusting your code, that becomes:
y.Sheets("DTR").Cells.Delete
x.Sheets(1).Range("A1").CurrentRegion.Copy
y.Sheets("DTR").Paste y.Sheets("DTR").[a1]