Hi ,
Cost center is assigned to Position and these cost center is used at the time of posting of FI. Now your question is "Block the cost center can still be used in Org. management".
How you can block the cost center and where you will get the impact?
Ans :- You will block the cost center from FI side. And simultaneously you have to change this cost center with delimiting from the relationship. If you will not do then you will get an error in FI posting. Becuae it's checked that cost center is available in the system or not.
If cost center is blocked then you should get an information from FI and then you will do the delimiting the the existinct cost center to new cost center in the postion-cost center relationship.
Hope so you are clear now.
Regards,
Sankarsan