Since the picture doesn't show what is actually linked to what, here is a written description of the links I used between tables (with 2 alternates in case I'm wrong):
OPRJ.PrjCode left join INV1.Project
INV1.BaseEntry left join RDR1.DocEntry
INV1.BaseLine left join RDR1.LineNumber
INV1.DocEntry left join OINV.DocEntry
INV1.ObjType left join OINV.ObjType
INV1.ItemCode inner join OITM.ItemCode
OINV.CardCode inner join OCRD.CardCode
OINV.SlpCode left join OSLP.SlpCode
OITM.ItmsGrpCod left join OITB.ItmsGrpCod
RDR1.DocEntry left join ORDR.DocEntry
RDR1.DocEntry left join DLN1.BaseEntry
RDR1.LineNum left join DLN1.LineNum (s/b BaseLine?)
RDR1.DocEntry left joing POR1.BaseEntry
RDR1.LineNum left join POR1.LineNum (s/b BaseLine?)
RDR1.ObjType left join ORDR.ObjType
POR1.DocEntry left join OPOR.DocEntry
POR1.ObjType left join OPOR.ObjType
POR1.DocEntry left join PCH1.BaseEntry
POR1.LineNum left join PCH1.BaseLine
PCH1.DocEntry left join OPCH.DocEntry
PCH1.ObjType left join OPCH.ObjType
DLN1.DocEntry left join ODLN.DocEntry
DLN1.ObjType left join ODLN.ObjType