Upgrade from 11.1 to 11.1.2 "JRE libraries are missing or not compatible"

I am stuck with an error that I can't resolve; I have tried googling and even tried thinking: no luck

 "JRE libraries are missing or not compatible"

here is what I do:
sudo su
cd /
mkdir tmp2
IATEMPDIR=/tmp2
export IATEMPDIR
export JAVA_HOME=/opt/ibm/c...