https://userapps.support.sap.com/sap/support/knowledge/en/3617240
3617240 - /SAPAPO/RRP_IOLIST_GET_DATA does not import data in //RRP4 (Receipts View) same as in...
/SAPAPO/RRP_IOLIST_GET_DATA does not import data in //RRP4, but does in //RRP3. No relevant error messages or error codes mentioned.