Solution : https://service.sap.com/sap/support/notes/1538600 (SAP Service marketplace login required)
Key words :
system administration => system configuration =>portal display =>url alias manager, \\<server>\sap\<sid\j00\j2ee\cluster\apps\sap, /saphelp_nw73/helpdata/en/48/1d5d0171364269e10000000a421937/frameset, defined portal url alias, irj j2ee application, >portal/custom </param-, \irj\servlet_jsp\irjb, ep-basis sca, include_application _name_in_url=1</param-, file system
Related Notes :
| 1531306 | Central Note for NetWeaver 7.30 EP / EPC |
| 1403832 | Central Note: Upgrade Systems on SAP NetWeaver 7.3 |