There is lots of info on this error and how to fix but I've tried so many of them and nothing has worked: see below the problem chunk of code
Range("A1:K2").Select
Selection.Copy
Windows("EIL Depannage Register.xlsm").Activate
Sheets("Raising Depannage").Select
ActiveSheet.Unprotect
Sheets("Import_Sheet").Select
ActiveSheet.Unprotect
Range("A1").Select
Application.Wait (Now + TimeValue("00:00:10"))
ActiveSheet.Paste <<<<<error happens at this line
Error occurring on the last line with .Paste.
SelectandActivatewhen you don't need to. Look at this, this, and this. - PeterT