ERROR_DUP_DOMAINNAME - 1221 (0x4C5)

Technical Meaning

The ERROR_DUP_DOMAINNAME error, with the numeric code 1221 and the hexadecimal representation 0x4C5, indicates that a workgroup or domain name is already in use by another computer on the network. This error typically occurs during operations such as joining a domain or configuring network settings.

Error Details

This error suggests that there is an attempt to assign a domain name that is currently being used by another system within the same network environment. The specific operation that triggers this error can vary, but it often relates to network configuration tasks like joining a domain or setting up workgroups.

Usage Context

The ERROR_DUP_DOMAINNAME error can occur in various scenarios where a unique domain name is required for proper network functioning. Common contexts include:

• Joining a computer to an existing domain
• Configuring a new workgroup
• Changing the domain or workgroup name of a system

Developer Interpretation

Developers should interpret this error as indicating a conflict in naming conventions within the network environment. The presence of this error suggests that the specified domain name is already in use, and therefore cannot be assigned to another computer.

Related Errors

• ERROR_DOMAIN_EXISTS (1520)
• ERROR_NO_SUCH_DOMAIN (1638)
• ERROR_INVALID_WORKSTATION_NAME (1409)

FAQ

Q: What does the ERROR_DUP_DOMAINNAME error mean?

A: It indicates that a workgroup or domain name is already in use by another computer on the network.

Q: How can I resolve this issue?

A: Ensure that the specified domain name is unique within your network environment. Rename the existing system using the conflicting domain name, or choose a different name for the new system.

Summary

The ERROR_DUP_DOMAINNAME error (1221) signifies a conflict in domain naming within a network. Developers should handle this error by ensuring that unique names are used to avoid conflicts and maintain proper network functionality.