upgrading policy server to 12.8.07 from 12.8.05 , installer failing with jre libraries missing or not compatible

Products

• CA Single Sign On Agents (SiteMinder)
• CA Single Sign On Federation (SiteMinder)
• CA Single Sign On Secure Proxy Server (SiteMinder)
• CA Single Sign On SOA Security Manager (SiteMinder)
• SITEMINDER

Issue/Introduction

adminui upgrade is failing on kornshell.

User upgraded policy to 12.7 , executed successfully adminui pre-req.

while executing ca-adminui-12.8-sp07-linux-x86-64.bin , its failing on "korn shell"not found, ksh is installed 

Environment

PRODUCT: Symantec Siteminder

VERSION : 12.8.07 and older

OS: UNIX / LINUX

Cause

eventhough it shows "ksh" error , its actually due to /tmp not having write permissions.

Resolution

User need to create a temp directory

# mkdir /ca_tmp
# chmod 777 /ca_tmp
# IATEMPDIR=/ca_tmp; export IATEMPDIR

and ran the admin binary , which upgraded successfully and internal validation was successful.