Portuguese legislation and import of invoices

SOLVED

Dear All

I am trying to import invoices to V6 using a signed numbering and I am getting the erro below

"Erreur sur compteur (2LO) : Un compteur sujet à signature numérique ne peut être utilisé pour un document externe"

Do you know if it is allowed to importe sale invoices directly in the system with a type of invoices which is digitaly signed (DKSDATA)

Regards