Hi all.
I found the reason why :
It's because i'm french, and nobody's perfect ! ;)
The excel sheet i try to import is encoded by a french release of Excel, (Windows Western European pagecode).
Unlike CSV import, where we can choose file encoding, we can't with Excel sheets...
I just have to convert xlsx to csv before importing, then i'm able to choose good file encoding...
Is it possible to have file encoding option with Excel sheets in a next release of TDP ??
Regards...
Franck