informix安装目录，为什么每次输入命令都在/user/informix下？

我设置的informix安装目录是/home/informix,为什么我每次输入命令都是要在/user/informix下呢

INFORMIX DIR设置值为/home/informix

[informix@localhost store_test]$ esqldemo
-23101 Unable to load locale categories.
cp: cannot stat `/usr/informix/demo/esqlc/*.ec': No such file or directory
cp: cannot stat `/usr/informix/demo/esqlc/inpfuncs.c': No such file or directory
cp: cannot stat `/usr/informix/demo/esqlc/prdesc.c': No such file or directory
-23101 Unable to load locale categories.