/SAPAPO/OM_PEG_CAT_GET_ORDERS doesn't return any data

Experts,

We are trying to run the FM /SAPAPO/OM_PEG_CAT_GET_ORDERS  to get the ORDER data  from the PEGGING ID's but we are seeing the below errors  when executing the FM standalone in SE37.

Has anybody used this FM to get ORDER data from live cache successfully?

Also if we need to use BAPI's to select the ORDER data based on pegging ID's which one should I use and what is the difference in terms of processing and times in comparison to using the std API FM to get the data from LIVE CACHE?\\

Thanks for your time.