Grey out profit center field in account assignment in VA01/VA02

Hi All,

I have a requirement where i have to disable profit center field in Account Assignment tab in VA01/VA02 transactions for particular users based on some conditions.

I tried it using Exit USEREXIT_FIELD_MODIFICATION in program MV45AFZZ.

I am able to modify rest of the fields of sales order using this exit, but not profit center.

If anyone came across similar requirement, kindly help me out.

Thanks,

Malvi Aggarwal