The export operation is enabled by setting the project default ZI_SITEAPI to Y on A.20.12. This default can be set only on the product group/project level, but not for a specific discipline. Modification of the project default is not possible if site data already exists.
If some of the tables used in the Site API contain data defined in the product group, it is also necessary to set the value of the project default in the product group to Y.
Data of tables that are not assigned to any project at all (like unit groups, units, NLS, and so forth) are always exported if ZI_SITEAPI is set to Y for at least one project.