SAP ABAP Program FH5ANTOP (Header for SAPFH5AM) is using

• Message Class (1)
• Table (4)

#	Object Type	Object Name	Object Description	Note
1	Table	T77EO	External Object Types
2	Table	T77OA	Object Types and Infotypes per Aspect
3	Table	T77PA	Plan Versions per Aspect
4	Table	T77S0	System Table