2 Replies Latest reply on Feb 3, 2011 3:57 PM by 743213

    ORA-12505 TNS:Listener does not currently know of SID given in connect desc


      I am a student using Oracle/XE I loaded the software and use it for a while then all at once I can not connect. This is the error message. I keep having to reload Oracle/XE software then reload all my files again. Can you tell me what I am missing and what I need to do?

      Thanks so much for your help.