First Thanks for this A306
 
	impossible to make a second flight by changing the fpln with Simbrief after taking off.
 
	FMCDU: impossible to enter data on page 2 (INIT) BLK FUEL / ZFW / MACZFW
 
	only the flight plan matters - not the data.
 
	So vnav inop.
 
	 
 
	thank you