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The names can be different when another prefix than Z_ is used. The correct installation can be checked in "Administration → Connection Data → Function Modules".
This function can also be performed for several objects at the same time - the results will be displayed in several tabs:
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In SAC - Displays a flat list of the direct usages in SAC Stories. 
For that functionality, SAC must be licensed and you have to maintain a source System Mapping (see Maintain Source System Mappings).
Every grid in every tab contains a column Usage Of. This column identifies the entity which is used in the result. This is needed if you start a Where-Used Analysis for multiple entities.
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