Solution : https://service.sap.com/sap/support/notes/205134 (SAP Service marketplace login required)
Key words :
sapsys <sapsystemname>_<instancename>_<hostname> chmod 644 <sapsystemname>_<instancename>_<hostname> runstats problems, os/390 additional key words r3setup db2foros/390 os/390 mvs installation windowsnt aix, 1 pre-installation2 r3setup - instance installation3 post-installation4 installation documentation -, 6c db2 pm db2 pm installation, installing db2 pm capi dll, /3 frontend underxx-ser-swfl-ship, 2 r3setup - instance installation instance profile, windows nt - db2 udb, dbs/db2/standby_ssid = <db2_ssid>, operating system commands 'chown'