Create 3D text on CATIA from a DXF or DWG

For some time now, I can't open a text saved in DXF or DWG to generate a 3D text.
I get the message " DXF file without HEADER description. Some data cannot be imported " which appears and nothing is displayed... :frowning_face:
I recently changed my Post and some settings, or options, must have been omitted but I can't remember where, and how, to adjust these settings to make it work again.
Can anyone help me?
Thank you in advance!