SAP ABAP Program LK23EF01 (first forms for selecting) is using

• Class (1)
• Table/Structure Field (25)
• Message Class (1)
• Message Number (2)
• Class Method (1)
• Table (4)

#	Object Type	Object Name	Object Description	Note
1	Table	COBK	CO Object: Document Header
2	Table	COEP	CO Object: Line Items (by Period)
3	Table	COSEL	Selection table with field name
4	Table	KALC_VALSD	Allocations: Sender Fields for Sender/Receiver Validation