Quote Originally Posted by Keebellah View Post
The problem is that you're switching sheets and that is not allowed with events, you have to approach it differently. Not inside a worksheet module
Thanks i fixed it

Dim wb As Workbook
    Set wb = Application.Workbooks("worksheet1.xlsm")
    wb.Activate
    'wb.Sheets("Sheet1").Range("A1").Select  'No error.