OBIEE 10g: Ibots Problem (Authentication Failed)

Oracle OBIEE 10.1.3.4.1v [1900] 

Execution Error: [nQSError: 68019] Authentication Failed. 

This issue usually happens when: 
Failed Running an iBot 
Failed Saving an iBot 

The issue is caused by: 
1. The password in for the BI Scheduler may not be set correctly (or has case sensitivity issues) 
2. The password may be confused during setup for the BI Server password (set in Admintool) or the cryptotools password. 
3. OR if the password is changed incorrectly. 

SOLUTION 

The 68019 error usually happens when a password is changed in the Scheduler and/or cryptotools and should be 'reset' in order to resolve the issue. 
Take a backup of your Scheduler instanceconfig.xml file (which is in C:\OracleBIData\scheduler\config).

Change the Administrator password to a password. 
Restart all of your OBIEE services.