SAP ABAP Program LCOIHFGZ (CHECK_EXT_NUMBER) is using

• Table/Structure Field (13)
• Function Module (4)
• Message Class (2)
• Message Number (5)
• Table (5)

#	Object Type	Object Name	Object Description	Note
1	Table	AUFK	Order master data
2	Table	CAUFVD	Dialog Structure for Order Headers and Items
3	Table	HIKO	Order master data history
4	Table	NRIV	Number Range Intervals
5	Table	T003O	Order Types