importing an XER file with EPS activity codes

Dear Members,

I have a P6.2, and the next problem.

I have a project with EPS activity codes.

I have a client who wants XER file. If he imports into his own database, then the EPS activity codes do not come along.

I also tried the XML file, but the EPS activity codes are not put in EPS structure where the project stands.

Is there a hidden setting that allows for an XER file to import all data from the project (including the EPS activity codes)
PS. in the export file, the codes are available!

thanks for your comment