OCU installer fails with error "ocu installer appears to have failed to start. Its PTC and/or XML log is missing" in Windchill PDMLink

• OCU installer fails with error:

INFO   date/time - Running:  su oracle -c /software/Windchill11_M030_cps11/windchill_11.0_third_party_software_M030-CPS11/OCU/setup LAX_VM /var/tmp/ptc_installer_jres/Sun_JRE_1.8.0_162_Linux_INTEL/jre/bin/java -f /ptc/Windchill_11.0/PSI/installer/PSITempProps/ocu-installer.properties -DMULTI_PROGRAM_EXEC=1 
INFO   date/time - Completed:  su oracle -c /software/Windchill11_M030_cps11/windchill_11.0_third_party_software_M030-CPS11/OCU/setup LAX_VM /var/tmp/ptc_installer_jres/Sun_JRE_1.8.0_162_Linux_INTEL/jre/bin/java -f /ptc/Windchill_11.0/PSI/installer/PSITempProps/ocu-installer.properties -DMULTI_PROGRAM_EXEC=1 
INFO   date/time - return code = 208 
DEBUG  date/time - Installation is Aborting.  The installation cannot continue.
FATAL  date/time - Aborting installation. 
FATAL  date/time - Installation is Aborting.  The installation cannot continue.
 
FATAL  date/time - ocu installer appears to have failed to start. Its PTC and/or XML log is missing 
FATAL  date/time - aborting: original exit_code = 2 
FATAL  date/time - aborting: normalized exit_code = 2 
DEBUG  date/time - SHUTDOWN REQUESTED 
DEBUG  date/time - (X) commiting registry 
DEBUG  date/time - (X) shutting down service manager 
DEBUG  date/time - (X) cleaning up temporary directories 
DEBUG  date/time - Exiting with exit code: 2 
DEBUG  date/time - cleanUp() 
DEBUG  date/time - calling cleanUpUNIX()

DEBUG  date/time - *** USER_PRIV :oracle 
INFO   date/time - Running:  su oracle -c /media/psf/custom_temp/102/PTC_Windchill_10.2_Third_Party_Software_M030/OCU/setup LAX_VM /var/tmp/ptc_installer_jres/Sun_JRE_1.7.0_72_Linux_INTEL/jre/bin/java -f /opt/ptc/Windchill_10.2/PSI/installer/PSITempProps/ocu-installer.properties -DMULTI_PROGRAM_EXEC=1 
INFO  date/time - Completed:  su oracle -c /media/psf/custom_temp/102/PTC_Windchill_10.2_Third_Party_Software_M030/OCU/setup LAX_VM /var/tmp/ptc_installer_jres/Sun_JRE_1.7.0_72_Linux_INTEL/jre/bin/java -f /opt/ptc/Windchill_10.2/PSI/installer/PSITempProps/ocu-installer.properties -DMULTI_PROGRAM_EXEC=1 
INFO  date/time - return code = 255 
DEBUG date/time - Installation is Aborting.  The installation cannot continue. 
DEBUG date/time - Installation is Aborting.  The installation cannot continue.

Running:  su oracle -c /root/soft/PTCWindchill11.0ThirdPartySoftware/OCU/setup LAX_VM /var/tmp/ptc_installer_jres/Sun_JRE_1.8.0_102_Linux_INTEL/jre/bin/java -f /opt/ptc/Windchill_11.0/PSI/installer/PSITempProps/ocu-installer.properties -DMULTI_PROGRAM_EXEC=1
INFO   date/time - Completed:  su oracle -c /root/soft/PTCWindchill11.0ThirdPartySoftware/OCU/setup LAX_VM /var/tmp/ptc_installer_jres/Sun_JRE_1.8.0_102_Linux_INTEL/jre/bin/java -f /opt/ptc/Windchill_11.0/PSI/installer/PSITempProps/ocu-installer.properties -DMULTI_PROGRAM_EXEC=1
INFO   date/time - return code = 126
DEBUG  date/time - Installation is Aborting.  The installation cannot continue

• Directly running the ocu installer command "su oracle -c xxx/OCU/setup ..." in command window fails with error: No protocol specifie​​​​​​