Field help (GENVACLOK) 

This flag is used to initialize the "to block" flag of the wave resulting from a generic wave.
When launching a wave, this parameter is used to force the creation of associated missions with status '6-blocked', thus ignoring the mission setup at site level.

SEEINFO This setup only concerns missions with a picking type (PKOMVT, PKOPRC and PKOSHP) and missions with a merging of flows transfer type (TRFMERG). All the other mission types will apply the setup of the missions.