SAP ABAP Function Module WRF_REF_HEAD_READ_SINGLE (Read singe WRF_REF_HEAD_entry) is using

• Class (2)
• Data Element (2)
• Table/Structure Field (23)
• Message Class (1)
• Message Number (1)
• Class Method (3)
• Table (5)

#	Object Type	Object Name	Object Description	Note
1	Message Number	WRF_REF - 013	There is no reference assignment for material &1/plant &2