The return code 10048 is a Windows return codes that states: Only one usage of each socket address (protocol/network address/port) is normally permitted. The error ANR8208W states that the TCPport specified is already used by another application.
Error 10048 means Address already in use. You are trying to open a connection on a socket that is already in use. If a client disconnects from the server then the server needs to close the server socket that was used for that client. The client already closed his socket.
What causes socket errors of 10048 on the client?
See http://msdn.microsoft.com/en-us/library/e160993d%28v=VS.90%29.aspx SetSocketOption. Do you need DontLinger or ReuseAddr or both, I’m not sure. Essentially, your sockets will hang in the TIME_WAIT state for a while after the TCP connection is interrupted. Once you get enough, your requests won’t be able to create new client connections.
Why is winerror 10048 refusing to open socket?
When running another to instantiate the script, the launch option still has the listen transport open, so any attempt to open the situation is rejected with error 10048/WSAEADDRINUSE. If you want to run the script again, you now need to signal the running service to stop and close my socket.
Why do I get TCP error 10048 on WCF?
If you downvote enough, you often end up with all available ports, which in turn results in TCP error 10048. In general, WCF tries to avoid these kinds of problems with connection pooling and similar problems. This is generally a matter of a person with internal services that do not really go through this Internet.
Why is my Python Server getting a 10048 error?
You can periodically restart the server, which allows you to start the client again. (Also, the server could potentially get error 10048 if it also tries to bind a socket just because the OS is holding it for a previous owner. If you see this, see SO_REUSEADDR in the documentation.)
How do I fix bind error 10048?
Cause 1 can be fixed by stopping the program using your port if your program is using multiple ports. Cause 2 can be fixed by running only one instance of your program at a time. Cause 3 can be fixed by setting a few minutes or by using this SO_REUSEADDR socket option.
How do I fix Runtime Error 10048 address in use?
This error occurs when your operating system is unable to allocate sockets on the fly….
How do I fix error 10048?
To avoid problems, you should either remove this conflicting service from the other software, or change the port that this other software or VPOP3 uses for this messaging service. You can change the ports you want to use for VPOP3 on the main Services page in the VPOP3 settings.

Vijay is a tech writer with years of experience in the Windows world. He’s seen it all – from simple problems to catastrophic system failures. He loves nothing more than helping people fix their PCs, and he’s always happy to share his wisdom with anyone who needs it.
When Vijay isn’t fixing Windows problems, he likes to spend time with his wife and two young children. He also enjoys reading, playing cricket, and watching Bollywood movies.