Hi Jacobo,
Currently what is your source HANA version? You may need to check your delivery unit archive format, which should not be of a higher format version than you used for your HANA installation.
You may refer the note: 1984354 - Import of a Delivery Unit fails due to incompatible archive format version
Also you can have a look on the note : 1830600 - Import of delivery units failed / Cannot resume broken upgrade when doing the followup upgrade
Best regards,
SUJIT