When reading the article translations, a header, or several headers (features) have not yet been translated. Before the translated article import can be carried out, all article numbers must have been read into the database and all headers must have been translated. If no translation is yet known for a header from the import file, or if another translation has been used, this error message appears.
Solution:
Make sure that all features are already present and translated in the database and that the translations used in the import file are the same.
