Diagnosis
You have called up the function for manually confirming thederivation status. To do this, you have to choosederivations with a derivation status that allows you to confirm; thatis, the derivation of the batch must not have been confirmed manually.
However the nodes that represent this type of derivation have not beenselected in the tree.

System Response
You cannot carry out the function.

Procedure
Select nodes in the tree that contain a derivation, the status of whichhas not already been confirmed.