Diagnosis
A company code has not been defined in the current organizationalstructure.
Usually, the company code is maintained in the root node in theorganizational structure.
All organizational objects (force elements) inherit the company codefrom the root node. Technically, a company code can be assigned to oneorganizational object only.

Procedure
Maintain the company code on the 'Account Assignment' tab page for theroot node in the organizational structure.
The system also outputs this error if the assignment period between theforce element and company code (usually of the root node) is shorterthan the validity of the current object.
In this case, correct the inconsistent data.
Note:
You can also define your preferred company code in your user parameters:
BUK = Your company code