SAP Function WB2_OPEN_PURCH_INVOICE_WO_SUB - F/M to calculate the open purchase invoicing

Parameter	Reference	Type	Length	Default	Optional	Text
I_BUFREF	C	C	0	' '	X
I_DOC_NUMBER	VBELN	C	10		X	Sales and Distribution Document Number
I_DOC_TYPE	WB2_DOC_TYPE	C	2		X	Document Type
I_GJAHR	GJAHR	N	4		X	Material Doc: Fiscal year
I_ITEM	POSNR	N	6		X	Item number of the SD document
I_NAME	TFDIR-FUNCNAME	C	30		X	Name of Function Module
I_OPEN_SCENARIO	WB2_OPEN_SCENARIO	C	2		X	Scenario for Calculating Open Logistics Documents
I_READ_DB	C	C	0	' '	X
I_STEP	WB2_STEP	C	4		X	Business scenario read from table TB2BADD (Optional)
I_TEW	C	C	0	' '	X
I_TEW_TYPE	WB2_TEW_TYPE	C	4		X	Function module name
I_TKONN	TKONN	C	10		X	Trading contract: Trading contract number
I_TPOSN	TPOSN	N	6		X	Trading contract: item number

Parameter	Reference	Type	Length	Text
E_REF_FIELD	C	C	0
E_VALUE	C	C	0

Functionality
This function module is used in Trading Execution Workbench to calculatethe open purchase invoice quantity without subordinate documents.