Last day I updated the spfile, but I made a mistake, I write a non-existing SID, I want wrote IND1 (Instance number one) but wrote IND11. Now I have a entry for instance IND11. This is a typical error.
For remove it from spfile you must to reset the parameter as show below;
alter system reset memory_target scope=spfile sid=’IND11′;
Now I have a nice spfile. Next time I must to be more carefull.
HTH – Antonio NAVARRO.