Solution : https://service.sap.com/sap/support/notes/1525198 (SAP Service marketplace login required)
Key words :
\sapdb\u28\db db_reg db u28 control, /sapdb/data/wrk/u28/diaghistory/history_knlmsg, \sapdb\dataplease enter independent program path[, \sapdb\data\config\install\instreglog2 file, 22system path cleaned successfullyplease reboot, \sapdb\u28\db\symbols\tracesort, users\application data/sdb/data], /sapdb/data/wrk/u28/diaghistory, \sapdb\u28\db\pgm\dbmsrv, \sapdb\u28\db\pgm\stop
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