SAP Message /SAPCND/TRANSPORT019 - Field catalog &1/&2/: Item number already exists.

Diagnosis
When transporting the field catalog (Table /SAPCND/T681FA) it was foundin field &v2& for application &v1& that item number &v3& (FieldFIELDPOS_COMMSTR) was already used for category &v4& of thesubcommunication structure.

System Response
The system assigns new item numbers in the target system for the fieldsin the subcommunication structure of category &v4& from the fieldcatalog.