ERROR_CLUSTER_IPADDR_IN_USE - 5057 (0x13C1)
The cluster IP address is already in use.
Updated: Feb 21, 2026
Introduction
This article provides a detailed technical reference for the Windows error code ERROR_CLUSTER_IPADDR_IN_USE with the numeric value 5057 and hexadecimal representation 0x13C1. The focus is on understanding its meaning, context, and developer interpretation.
Technical Meaning
The error ERROR_CLUSTER_IPADDR_IN_USE indicates that a cluster IP address has already been assigned to another network interface or resource within the same cluster environment. This error typically occurs during operations involving the configuration or management of cluster resources.
Error Details
When this error is encountered, it signifies that an attempt was made to assign a specific IP address to a cluster resource, but the address is currently in use by another component. The error does not provide information about which component is using the address, as this can vary depending on the context and configuration of the cluster environment.
Usage Context
This error code is relevant in scenarios where network configurations are being managed or modified within a Windows Failover Cluster. It may occur during operations such as adding an IP address to a cluster resource, configuring network settings, or performing maintenance tasks that involve network resources.
Developer Interpretation
Developers should interpret this error as indicating a conflict with existing network configurations. The operation failed because the specified IP address is already in use by another component within the cluster. This could be due to manual configuration errors, misconfiguration of network settings, or concurrent operations attempting to assign the same IP address.
Related Errors
ERROR_INVALID_PARAMETER(1208): Occurs when a parameter passed to an API function is invalid.ERROR_ADDRESS_ALREADY_ASSOCIATED(10039): Indicates that an attempt was made to associate an address with a socket, but the address is already in use.
FAQ
Q: What does the error ERROR_CLUSTER_IPADDR_IN_USE mean?
A: It means that the specified IP address is already assigned to another network interface or resource within the cluster environment. This can occur during operations involving the configuration of cluster resources.
Q: How can I resolve this issue?
A: Ensure that the IP address you are attempting to assign is not already in use by another component. Verify the current network configurations and make necessary adjustments before retrying the operation.
Summary
The error ERROR_CLUSTER_IPADDR_IN_USE indicates a conflict with existing network configurations within a Windows Failover Cluster environment. Developers should ensure that IP addresses are correctly assigned to avoid such conflicts during operations involving cluster resources.