Solution : https://service.sap.com/sap/support/notes/312947 (SAP Service marketplace login required)
Key words :
basis support packages listed, lower support package level, additional key words sgen, prerequisites transaction sgen generates, release / support package number, report generation abap load, unknown object type', object unknown'e', status values listed, release interval'i'
Related Notes :
379918 | Redesign of the SGEN transaction |
303556 | Interpretation of the Transaction SGEN display |
302500 | Transaction SGEN terminates with PXA_NO_FREE_SPACE |