SAP ABAP Program LF021TOP (LF021TOP) is using

• Table/Structure Field (9)
• Message Class (1)
• Table (16)

#	Object Type	Object Name	Object Description	Note
1	Table	BNKA	Bank master record
2	Table	BSEG	Accounting Document Segment
3	Table	BSEZ	Line Item Additional Information (Online)
4	Table	IZEMTAB	Internal Structure for Alternative Payer/Payee
5	Table	KNA1	General Data in Customer Master
6	Table	KNB1	Customer Master (Company Code)
7	Table	KNB4	Customer Payment History
8	Table	KNB5	Customer master (dunning data)
9	Table	KNBK	Customer Master (Bank Details)
10	Table	KNC1	Customer master (transaction figures)
11	Table	KNC3	Customer master (special G/L transaction figures)
12	Table	KNKK	Customer master credit management: Control area data
13	Table	KNZA	Permitted Alternative Payer
14	Table	T001	Company Codes
15	Table	T005	Countries
16	Table	T042	Parameters for payment transactions