ERROR_UNKNOWN_PORT - 1796 (0x704)
The specified port is unknown.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_UNKNOWN_PORT error code indicates that a specified port is not recognized by the system. This can occur in various contexts, such as network communication or device driver operations.
Error Details
- Error Name: ERROR_UNKNOWN_PORT
- Numeric Code: 1796 (0x704)
- Short Description: The specified port is unknown.
Usage Context
This error can be encountered in scenarios where a specific network port or device port is expected to exist but is not found. It may also occur during the initialization of network drivers or when attempting to establish communication over an unrecognized port.
Developer Interpretation
Developers should interpret this error as indicating that the specified port does not match any known configuration in the system. This could be due to a misconfiguration, incorrect port number, or a missing device driver.
Related Errors
- ERROR_PORT_NOT_FOUND: Similar issue but may indicate a more specific failure scenario.
- ERROR_INVALID_PARAMETER: May occur if an invalid parameter is passed during a function call that involves ports.
FAQ
Q: What does the ERROR_UNKNOWN_PORT error mean?
A: It indicates that the specified port is not recognized by the system. This can be due to incorrect configuration or missing device drivers.
Q: How can I resolve this issue?
A: Verify the port number and ensure all necessary device drivers are installed correctly.
Summary
The ERROR_UNKNOWN_PORT error code signifies that a specified network or device port is not recognized. Developers should check for correct configuration and ensure all required components are properly installed to address this issue.