problem upgrading Netflow Analyzer from build 9700 to 9860

I get the following error:

# ./UpdateManager.sh

Looks like the database backup was not taken. Please run the BackupDB.sh in <NetFlow-Home>/troubleshooting folder to take backup of your data before migrating. Do you still want to continue with migration (y/n)?
y
Path : /opt/ManageEngine/NetFlow/jre/../conf/netflow/nfa.properties
PORT FILE IS = /opt/ManageEngine/NetFlow/bin/../conf/server.xml-------IS EXISTS === true
Path : /opt/ManageEngine/NetFlow/jre/../conf/netflow/nfa.properties
PORT FILE IS = /opt/ManageEngine/NetFlow/bin/../conf/server.xml-------IS EXISTS === true

Unable to load Disk Space related native library.
Exception in thread "Thread-1" java.lang.UnsatisfiedLinkError: getFreeSpace
        at com.adventnet.tools.update.installer.DiskSpace.getFreeSpace(Native Method)
        at com.adventnet.tools.update.installer.ApplyPatch.run(ApplyPatch.java:152)
        at java.lang.Thread.run(Unknown Source)