(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
Rod,
If you understand the Primavera database and know how to modify XER using Excel CSV format, you can copy and paste the code and rebuild the XER. If not, the easiest method is to create a dummy activity and assign all the codes using the following steps:
1) Create a dummy project with no WBS and have 1 activity and all activity codes you need to transfer (1 each on all of them).
2) Use the 'export to Excel' function using activities with all the columns of Activity Code you need to transfer as a template (e.g., Activity ID, Activity Status, Act code 1, Act code 2, Act code..., and so on).
3) Use the Copy and paste to Excel by opening all the activity code attributes that you want.
4) Create a dummy activity in the Excel template you created and copy-paste the activity codes per activity code columns you need to transfer.
4) Save the template and import it back to the dummy project.
Note: The main intention is to assign all activity codes to activities without any logic, dates, durations... just dummy data that can be exported and imported to another database.