Go to a different directory from the one on which you installed Oracle's Instant Client and enter the following command:
sqlplus scott@bigdb/tiger select user from dual;
On UNIX, if this test is successful, relink the run time to use the Instant Client. For instructions on relinking, see Completing the Installation. The ora_inst script recognizes the Instant Client structure; just tell it the directory into which you installed the Instant Client when asked for the ORACLE_HOME setting.
On Windows, if this test is successful, you are ready to use the runtime. The Windows run time loads the Oracle Instant Client dynamically from the specified path. To verify that you have loaded the application successfully, enter:
on the command line. You should see "Acu4GL ORACLE/OCI file system" included on the ACUCOBOL-GT window that is displayed.