%META:TOPICPARENT{name="ErrorMessagesU"}%

==Error Messages (U)==

[[UDAErrorMessages|A]] [[ErrorMessagesB|B]] [[ErrorMessagesC|C]] [[ErrorMessagesD|D]] [[ErrorMessagesE|E]] [[ErrorMessagesF|F]] [[ErrorMessagesG|G]] [[ErrorMessagesH|H]] [[ErrorMessagesI|I]] [[ErrorMessagesJ|J]] [[ErrorMessagesK|K]] [[ErrorMessagesL|L]] [[ErrorMessagesM|M]] [[ErrorMessagesN|N]] [[ErrorMessagesO|O]] [[ErrorMessagesP|P]] [[ErrorMessagesQ|Q]] [[ErrorMessagesR|R]] [[ErrorMessagesS|S]] [[ErrorMessagesT|T]] [[ErrorMessagesU|U]] [[ErrorMessagesV|V]] [[ErrorMessagesW|W]] [[ErrorMessagesX|X]] [[ErrorMessagesY|Y]] [[ErrorMessagesZ|Z]] [[ErrorMessagesSymbols|#]]


===Unable to attach to shared memory segment ===

Do you encounter either of these errors --

* unable to attach to shared memory segment
* unable to determine size of shared memory segment 

Check permissions on your $ORACLE_HOME/bin/oracle file. You may need to set the sticky bit.

First, run an ls -l $ORACLE_HOME/bin/oracle. It should look like this --

{{{
openlink> ls -l /$ORACLE_HOME/bin/oracle
-rwsr-s--x 1 oracle dba 33692568 Aug 18 2009 oracle
}}}

If it does not, use the chmod command to alter the permissions like this --

{{{
chmod 6751 oracle
}}}