SAP ABAP Program MK23BF20_SUBSTITUTION_POSITION (SUBSTITUTION_POSITION) is using

• Table/Structure Field (32)
• Table (3)

#	Object Type	Object Name	Object Description	Note
1	Table	COBK	CO Object: Document Header
2	Table	COBL	Coding Block
3	Table	RK23B	Screen fields-SAPMK23A in screen loops