WSAENAMETOOLONG - 10063 (0x274F)
Name component or name was too long.
Updated: Feb 21, 2026
Technical Background
The WSAENAMETOOLONG error is a specific error code returned by the Windows Sockets API when an operation fails due to a name component or the entire name being too long. This error typically occurs during socket operations, such as binding, connecting, or resolving host names.
Error Details
The WSAENAMETOOLONG error is defined with the following characteristics:
- Error Name: WSAENAMETOOLONG
- Numeric Code: 10063 (0x274F)
- Short Description: Indicates that a name component or the entire name was too long for the operation to proceed.
Common Causes
This error is commonly caused by:
- Invalid Parameter Values: An input parameter, such as a host name or file path, exceeds the maximum allowed length.
- Incorrect Object Type: The operation being performed on an object type that has specific limitations on name lengths.
- Exceeding Limits: The system imposes limits on the length of names for security and performance reasons.
Real-World Context
In network programming, this error can occur when attempting to bind a socket to a host name or IP address with a name that exceeds the maximum allowed length. Similarly, in file operations, it may arise when trying to access a directory or file path that is too long for the system's specifications.
Is This Error Critical?
The criticality of this error depends on the specific operation and context. For network programming, it can prevent successful connection establishment or data transmission. In file operations, it can hinder the ability to access files or directories.
How to Diagnose
To diagnose WSAENAMETOOLONG, follow these steps:
- Review Operation Context: Ensure that the operation being performed is appropriate for the object type and context.
- Validate Parameters: Check all input parameters, particularly host names or file paths, to ensure they do not exceed the maximum allowed length.
- Confirm Object Types: Verify that the correct object types are being used in the operation.
- Verify Input Data: Ensure that no data corruption has occurred that might have led to an excessively long name.
How to Resolve
To resolve WSAENAMETOOLONG, consider the following actions:
- Correct Parameter Usage: Use parameters that do not exceed the maximum allowed length.
- Adjust Operation Context: Modify the operation context if it involves a specific object type with known limitations.
- Restore Data: If data corruption is suspected, restore the original state or correct the corrupted data.
- Retry Operation with Valid Inputs: Attempt to perform the operation again with valid inputs that meet the system's name length requirements.
Developer Notes
Developers should be aware of the maximum allowed lengths for names in various operations and ensure that their code adheres to these limits. This can prevent runtime errors and improve application stability.
Related Errors
- WSAEHOSTUNREACH: Indicates a host is unreachable, which might occur if the name provided is invalid or too long.
- WSAEADDRINUSE: Suggests that an address is already in use, possibly due to a name conflict caused by excessive length.
FAQ
Q: What does WSAENAMETOOLONG mean?
A: It indicates that the name component or entire name was too long for the operation to proceed.
Q: How can I prevent this error in my application?
A: Ensure all input parameters, especially host names and file paths, do not exceed the maximum allowed length specified by the system.
Q: Can this error occur in both network programming and file operations?
A: Yes, it can occur in both contexts where name lengths are a factor.
Summary
The WSAENAMETOOLONG error is a specific error code that indicates an operation failed due to a name component or the entire name being too long. Developers should be mindful of this limitation and ensure their applications handle names within the specified length constraints to avoid runtime errors.