Solution : https://service.sap.com/sap/support/notes/815477 (SAP Service marketplace login required)
Key words : 
prerequisites program error im uc4 -, bapi_ipak_getdetail delivers error rsm1 028, uc4 global version 3, empty field'infopackage, executor continues working, data load process, uc4 reason, error text, error occurs, terms bapi_ipak_getdetail
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