On AIX ran into the following issue where sqlplus generated the following error when using local connection (bequeath).

scott@localhost:/home/scott:$ sqlplus system

SQL*Plus: Release 10.2.0.5.0 – Production on Fri Apr 1 15:47:21 2011

Copyright (c) 1982, 2010, Oracle. All Rights Reserved.

Enter password:
exec(): 0509-036 Cannot load program oracleTEST because of the following error
0509-150 Dependent module libjox10.a(shr.o) could not be loaded.
0509-022 Cannot load module libjox10.a(shr.o).
0509-026 System error: A file or directory in the path name does not exists
ERROR:
ORA-12547: TNS:lost contact

To fix the issue we had relink oracle by executing the following command.
scott@localhost:/home/oracle $ relink oracle
chmod 755 /orabin/TEST/bin

– Linking Oracle
rm -f /orabin/TEST/rdbms/lib/oracle
ld -b64 -o /orabin/TEST/rdbms/lib/oracle -L/orabin/TEST/rdbms/lib/ -L/orabin/TEST/lib/ -bnoerrmsg -bbigtoc -bnoipath -bI:/orabin/TESt/lib/ksms…

mv -f /orabin/TEST/bin/oracle /orabin/TEST/bin/oracleO
mv /orabin/TEST/rdbms/lib/oracle /orabin/TEST/bin/oracle
chmod 6751 /orabin/TEST/bin/oracle

After rebuilding “scott” user was able to execute sqlplus