Cost center &/& is not assigned to a business area on &

What causes this issue?

You want to create a business area balance sheet in company code &v4&,
but no business area has been assigned to cost center &V2& in
controlling area &V1&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Assign a business area to cost center &V2&, controlling area &V1&. Then
recreate the document. If you wish you can place a hold on the
incomplete document until then.
Alternately, you can check whether a business area balance sheet is
really required in company code &V4&. After corrections the document
can be edited further and posted.

Error message extract from SAP system. Copyright SAP SE.