What does the “IO Error: The Network Adapter could not establish the connection” error mean when trying to start the application?

„IO Error: The Network Adapter could not establish the connection”, 

it indicates that there is no network connection to the server.

In this case, you should check if:

  • there are correct entries of server address, port and instance name in the aSISt db.properites subdirectory;
  • the port or service is blocked on the ORA server firewall,
  • there is no network communication to the server.

Please, restart either database machine, net card or Oracle services. Use command:

netstat -ano

to check if default db port is not blocked by another process.

To kill the process, type its id and then run the command:

taskkill /pid 18264 /f

where 18264 is identification of another process that uses Oracle’s default port.