I am having trouble which is really different and weird I am not able to install ECC 6.0 SR3. its getting failed at "Test logon to SAP System QEC failed. SOLUTION: Make sure that the system is started, that the user DDIC exists and that the password of user DDIC is correct."
above all steps completed successfully. I am using "SAPinst Version 701_1 OPT (Jul 11 2009 05:48:52)" and using installation master is "SAP ERP 6.0 SR3 Installation Export Number 51033500_1"
I tried this but it never worked.
and several others also.