SAP Message UCD1018 - &3 may not be initialized for &1 &2

Diagnosis
The current data record does not contain any values for characteristicV3. however, v1 v2 assumes that the value of v3 is not blank.

System Response
The data record cannot be processed.

Procedure
Make sure that all data records to be processed contain values ofcharacteristic &V3&. In particular, make sure that a document type isassigned to the task.