Solution : https://service.sap.com/sap/support/notes/1685432 (SAP Service marketplace login required)
Key words :
sap web application server -> java development manual -> developing user interfaces -> web dynpro -> advanced web dynpro technologies -> web dynpro content administrator, 1 preparation2 splitting3 post-splitting activities4 additional informationdate section description-----------------------------------------------------------------------03/aug/12, uninstall ers instance22/mar/12 3 starting jspm fails04/jan/12 2 deleted, sap netweaver pi systems sap solution manager systems solution, ers instance profile <sid>_ers<xx>_<host>, ers profile <sid>_ers<xx>_<host>, component -> dual-stack split -> dual stack split tool 2, sap web application server, 0 including enhancement package 3 sap netweaver bw including, 0 enhancement package 6 restrictionsthe dual-stack split procedure