Standard Purchasing Organization.

Hi All,

I am unable to assign one of my purchasing organizations as standard to one of my plants in the following path : Enterprise Structure ® Assignment ® Materials Management ® .

The entire sceen is greyed out and there's no button for "New Entry" , and is disabled in the menu.

Could anyone of you please tell me, whether any prerquisite (set-up) is required in order to add entry in this screen ie, assigning standard purchasing organization to plant. I am working in IDES ver4.7EE.