https://bugs.documentfoundation.org/show_bug.cgi?id=157848
--- Comment #4 from Robert Großkopf <rob...@familiegrosskopf.de> --- Hi Julien, "so "cbc" part is interpreted as a prefix and the prefix is unknown." It's right, it is a prefix. I have tried to edit namespaces: Edit Element → Add → Edit Namespaces I added ubl urn:oasis:names:specification:ubl:schema:xsd:Invoice-2 cac urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2 cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2 This namespaces will be there after closing and reopening, but won't be there when saving the file and open it next times. If I really could add this namespaces (which doesn't seem to work) might bee the problem is gone. -- You are receiving this mail because: You are the assignee for the bug.