Tutorial
Intermediate Server
Common MU Online server errors and how to fix them
Connect Fail, a GameServer that closes on its own, SQL connection error: diagnose and fix the most common errors.
Every server owner will run into these errors. The good news: most have a known cause. Here's the quick diagnosis guide.
"Connect Fail" on the client
The client can't reach the ConnectServer. Check, in this order:
- Is the server on (ConnectServer running)?
- Is the IP/port in the Main correct?
- Are the ports open in the firewall and router?
- If you use No-IP, is the domain pointing to the right IP?
Dica: Test first on
127.0.0.1 (local). If it works locally but not externally, the problem is network (ports/firewall/No-IP).GameServer closes on its own
The GameServer opens and closes instantly. Common causes:
- SQL/DataServer unreachable (stopped service, wrong password, wrong ODBC);
- Port already in use by another program;
- Config file with a syntax error.
Nota: Always read the GameServer log. It usually says exactly which connection or file failed.
Database connection error
- Is the SQL Server service running?
- Is the authentication mode mixed?
- Does the DSN/ODBC point to the correct database?
- Is the database user's password correct?
Client won't open / file error
- Corrupted or incomplete client files (run the launcher);
- Antivirus blocking the Main (add an exception);
- Missing runtimes (DirectX, Visual C++).
Atenção: Before changing several things at once, change one and test. Fixing an error by changing everything at once only hides the real cause.
Perguntas frequentes
Why does 'Connect Fail' appear when entering the server?
Usually the client can't reach the ConnectServer: wrong IP/port in the Main, server offline, or ports not opened in the firewall/router.
Why does the GameServer close on its own?
Almost always it's a SQL/DataServer connection failure, a port already in use, or a config file with an error. The GameServer log points to the cause.