Assuming your system was copied properly, there are few thoughts here:
1) You are entering the BSP WD component workbench and opening up each component without specifying the enhancement set. This would cause the error you mentioned.
2) You don't have the system setup for development changes. You have changes turned off for Y/Z code
3) You didn't use a proper namespace originally Y or Z and the system thinks you are using SAP code
Take care,
Stephen