Knowledge base: Error Messages
The requested name is valid, but no data of the requested type was found (11004)

Cause

Winsock Errors are Microsoft Windows Sockets (TCP) errors, not VNC® errors, and are not directly related to VNC software.

This specific Winsock error implies some type of Name Resolution issue within the network environment.

Resolution

VNC software does not directly perform any type of Name Resolution, it simply asks the Operating System to perform all Name Resolution, and this error is being returned by the Operating System to the software. Therefore, if you're entering the computer's name (its hostname or fully qualified domain name), try using the IP address instead. This should resolve the issue in most cases.