No detailed planning exists for the combination

What causes this issue?

You want to look at the detailed planning for the combination &V1&/&V2&
(cost center or order/cost element). However, a detailed planning has
not yet been created for this combination.

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?

If necessary, place the cursor on the correct line in the overview
screen, and repeat the function 'Edit', 'Detailed planning'.

Error message extract from SAP system. Copyright SAP SE.