Setting in WorkStatus

Hi all,

I have set up 3 level: Unlocked, Reviewed, Approved In BPC System 10.0

But, when i change the workstatus, it notice: You cannot change the work status for "null"

I thinks the reason is the current status of all data is null, is not set to Unlocked. So i cannot change to another status

Please help me.

Thanks all!

Br.