3197396 - brconnect: error while loading shared libraries

brconnect command fails error like:

brconnect: error while loading shared libraries: libnnz19.so: cannot open shared object file: No such file or directory
or
brconnect: error while loading shared libraries:  libclntsh.so.11.1: cannot open shared object file: No such file or directory 

On AIX, the error looks like this:

Could not load program brconnect:
Dependent module libclntsh.so could not be loaded.
Could not load module libclntsh.so.
System error: No such file or directory 

And ldd is successful, for example:

sidadm> ldd brconnect (Note: brconnect locates client path is hard coded, brconnect doesn't rely on ldd result)
...
libnnz19.so => /oracle/client/11x_64/instantclient/libnnz19.so (0x00007f5b31df7000)

or
.....
libnnz19.so => /oracle/client/19/instantclient/libnnz19.so (0x00007f1882b6f000)

Oracle on UNIX

client, libnnz19.so, OIC, Oracle Instant Client, brconnect, ldd, readelf -d, 19, 19c, 19x, libclntsh.so.11.1 , KBA , BC-DB-ORA-DBA , Database Administration , Problem