Pre -Requisites There are mainly 2 steps 1.      Set the Environmental Variables   The Environmental Variables have to be set in the .profile mentioned below # Oracle and Informatica Settings ORACLE_SID=orcl_9.1; export ORACLE_SID ORACLE_BASE=/oracle; export ORACLE_BASE ORACLE_HOME=/oracle/11.2.0.3; export ORACLE_HOME INFA_HOME=/Informatica/Informatica_9.1; export INFA_HOME export ODBCHOME=$INFA_HOME/ODBC6.1 export ODBCINI=$ODBCHOME/odbc.ini PATH=$ORACLE_HOME/bin:$PATH; export PATH LD_LIBRARY_PATH=$ORACLE_HOME/lib export LD_LIBRARY_PATH CLASSPATH=$ORACLE_HOME/rdbms/jlib; export CLASSPATH export PATH export TNS_ADMIN= LANG=C; export LANG export LC_ALL=C PATH=$PATH:/Informatica/Informatica_9.1/server/bin; export … Continue reading Configuring and Upgrading Informatica 8.1 to 9.1