One additional note: ECC (of any EhP version) is not installed as an add-on to a NetWeaver ABAP system. You install ECC instead of NetWeaver ABAP (ECC includes NetWeaver ABAP). So, there is no purpose to installing NetWeaver first, then installing ECC over the top of it. There is also no purpose to installing anything from SAP ahead of a system copy (except perhaps diagnostics agents and your database platform), as SWPM will itself install the target system as part of the system copy process.
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