Hello John R Pierce, When i run the $su - postgres #which psql Its dispalying like: [root@CentOS-60-32-minimal ]# su - postgres -bash-4.1$ which psql /usr/bin/psql and for $ ldd $(which psql) command it displaying like -bash-4.1$ ldd $(which psql) linux-gate.so.1 => (0x00112000) libpq.so.5 => /usr/lib/libpq.so.5 (0x005b5000) libssl.so.10 => /usr/lib/libssl.so.10 (0x00f22000) libreadline.so.6 => /lib/libreadline.so.6 (0x0082e000) libc.so.6 => /lib/libc.so.6 (0x001f2000) libcrypto.so.10 => /usr/lib/libcrypto.so.10 (0x009cf000) libgssapi_krb5.so.2 => /lib/libgssapi_krb5.so.2 (0x0039d000) libcrypt.so.1 => /lib/libcrypt.so.1 (0x00de2000) libldap_r-2.4.so.2 => /lib/libldap_r-2.4.so.2 (0x00113000) libpthread.so.0 => /lib/libpthread.so.0 (0x00e42000) libkrb5.so.3 => /lib/libkrb5.so.3 (0x00c86000) libcom_err.so.2 => /lib/libcom_err.so.2 (0x0046f000) libk5crypto.so.3 => /lib/libk5crypto.so.3 (0x0092f000) libresolv.so.2 => /lib/libresolv.so.2 (0x00e24000) libdl.so.2 => /lib/libdl.so.2 (0x00dd2000) libz.so.1 => /lib/libz.so.1 (0x008d7000) libtinfo.so.5 => /lib/libtinfo.so.5 (0x00bf8000) /lib/ld-linux.so.2 (0x00ba1000) libkrb5support.so.0 => /lib/libkrb5support.so.0 (0x00f99000) libkeyutils.so.1 => /lib/libkeyutils.so.1 (0x00166000) libfreebl3.so => /usr/lib/libfreebl3.so (0x0095f000) liblber-2.4.so.2 => /lib/liblber-2.4.so.2 (0x00be1000) libssl3.so => /usr/lib/libssl3.so (0x0066e000) libsmime3.so => /usr/lib/libsmime3.so (0x00169000) libnss3.so => /usr/lib/libnss3.so (0x00473000) libnssutil3.so => /usr/lib/libnssutil3.so (0x00194000) libplds4.so => /lib/libplds4.so (0x00e62000) libplc4.so => /lib/libplc4.so (0x001ae000) libnspr4.so => /lib/libnspr4.so (0x001b3000) libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x00382000) libselinux.so.1 => /lib/libselinux.so.1 (0x003db000) is it the path problem...?? ----- Regards, Suresh Hosur -- View this message in context: http://postgresql.1045698.n5.nabble.com/psql-error-psql-symbol-lookup-error-psql-undefined-symbol-PQconnectdbParams-tp5104950p5105203.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general