cannot find libiconv.so.2 when running tuxedo art sample_01

when doing sample/sample_01/start.sh
error occurs saying  libiconv.so.2  no such file or directory

I couldn't find libiconv.so.2 anywhere so I used libgiconv for it like,,,

> cd /opt/oracle/tuxedo11gR1
> ln -s libgiconv.so libiconv.so.2

after that no error at start.sh