[V7] will not printing bold family

[bouteiller emmanuel]

if you come Menu/accounting / invoice
select invoice

i ve this :

Can't map determine family/bold/italic for dejavu sans handle_pageBegin args=()

(<type 'exceptions.valueerror'="">, ValueError("Can't map determine family/bold/italic for dejavu sans\n handle_pageBegin args=()",), <traceback object="" at="" 0x0668bc38="">)

I have this message with the V7 version of windows, tested with the same results on W7, W8 pro all version