Field help (BDCPY) 

This field uses the company code.
The company code of the operation is initialized via the site associated with the user code.
It can be modified provided it has been chosen from the list of authorized companies.
On entry of the second line, the sytem uses by default the value of the previous line.

If the budget is defined at company level, the company must necessarily be specified.
In that case, the Site field is no longer accessible and it is only assigned for information purposes.