Solution : https://service.sap.com/sap/support/notes/1357721 (SAP Service marketplace login required)
Key words :
sap netweaver 2004s sp stack 20, central note, portal platform, note serves, entry point, issues related, nw04s sps20, prerequisites
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1422828 | SAP NW Portal Platform NW04s, SPs20 - Known Issues |