ERROR_CONNECTION_INVALID - 1229 (0x4CD)
An operation was attempted on a nonexistent network connection.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_CONNECTION_INVALID (1229, 0x4CD) indicates that an operation was attempted on a nonexistent network connection. This error is returned when the system encounters a situation where a required network resource or connection does not exist.
Error Details
This error typically occurs in scenarios involving network operations such as file access over a network, remote procedure calls (RPC), or other network-dependent services. The error suggests that the specified network resource was not found or is invalid.
Usage Context
The context of this error can vary depending on the specific API or function being used. Common contexts include:
- Network file operations: Attempting to access a remote file or directory when the connection to the server is lost or never established.
- RPC calls: Initiating an RPC call to a service that does not exist or cannot be reached.
- Network services: Using network services where the required network resource is missing.
Developer Interpretation
When encountering ERROR_CONNECTION_INVALID, developers should consider the following:
- Verify the existence and validity of the network connection before performing operations. Ensure that the network path, IP address, or server name is correct.
- Check for any network connectivity issues such as a dropped connection or incorrect configuration.
- Validate the parameters passed to network-related functions to ensure they are correctly specified.
Related Errors
ERROR_FILE_NOT_FOUND(2): Similar error but specific to file operations.ERROR_INVALID_PARAMETER(1208): Indicates an invalid parameter, which could be related if a required parameter is missing or incorrect.ERROR_NETWORK_UNREACHABLE(67): Suggests the network itself is unreachable, possibly due to routing issues or firewall settings.
FAQ
Q: What does ERROR_CONNECTION_INVALID mean?
A: It indicates that an operation was attempted on a nonexistent network connection. Ensure the network resource exists and is correctly configured.
Q: How can I resolve this error?
A: Verify the network configuration, check for connectivity issues, and ensure all parameters are correct before retrying the operation.
Summary
ERROR_CONNECTION_INVALID (1229, 0x4CD) is a specific error indicating an attempt to perform an operation on a nonexistent network connection. Developers should focus on validating network resources and ensuring proper configuration to avoid this error.