This script can be used for troubleshooting. In Oracle Applications there are two kinds of users -- the Oracle...
user and application user. The Oracle user password can be verified by direct login. But the applications login can't be directly verified by Oracle (SQLPlus) login. This is not possible because the application user is not created on the Oracle level or by login on self-service. You first have to verify that the guest password is good (it should match DBC file entry). This script will verify that. It has been tested in 11.5.7 and 188.8.131.52.
When running the following script, return Y password is correct. Otherwise change it to Using FNDCPASS.
Note: GUEST/ORACLE is defalt username/PASSWD
Sqlplus apps/apps select fnd_web_sec.validate_login('GUEST','ORACLE') from dual; exit
Change applications user password: This example shows how to change sysadmin user password.
FNDCPASS apps/apps 0 Y system/manager USER SYSADMIN WELCOME