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 run-time system. The Windows run time loads the Oracle Instant Client dynamically from the specified path. To verify that you have loaded the application successfully, enter:
wrun32 -v
on the command line. You should see "Acu4GL ORACLE/OCI file system" included on the ACUCOBOL-GT window that is displayed.