ERROR_CORE_RESOURCE - 5026 (0x13A2)

The cluster resource could not be deleted since it is a core resource.

Updated: Feb 21, 2026

Technical Meaning

The ERROR_CORE_RESOURCE error code, with the numeric value of 5026 and the hexadecimal representation of 0x13A2, indicates that a specific operation could not be completed because it involves a core resource in a cluster environment. Core resources are essential components within a Windows Failover Cluster that cannot be deleted or modified due to their critical nature.

Error Details

This error is encountered when attempting to delete a cluster resource that has been designated as a core resource by the system. Core resources play a fundamental role in maintaining the integrity and functionality of the cluster, and therefore, they are protected from deletion or modification through administrative actions.

Usage Context

The ERROR_CORE_RESOURCE error typically arises during operations such as managing cluster resources using command-line tools like clusvcadm, PowerShell cmdlets for Failover Clustering, or other administrative interfaces. It is important to note that this error does not indicate a failure in the underlying hardware but rather a limitation imposed by the system design.

Developer Interpretation

When encountering this error, developers should understand that it signifies an attempt to modify a core resource within a cluster environment. Core resources are essential for the proper functioning of the cluster and cannot be altered or deleted without potentially causing significant disruptions. Developers must ensure that their operations do not inadvertently target such critical components.

Related Errors

  • ERROR_RESOURCE_NOT-Owned (2186, 0x87A): Indicates an attempt to access a resource that is owned by another node in the cluster.
  • ERROR_CLUSTER_INVALID_NODE (5039, 0x13B3): Occurs when attempting to perform operations on a node that does not exist or is invalid within the cluster.

FAQ

Q: What causes the ERROR_CORE_RESOURCE error?

A: The error occurs when an attempt is made to delete or modify a core resource in a Windows Failover Cluster, which are essential components and cannot be altered.

Q: How can I resolve this issue?

A: Since core resources are critical for cluster functionality, they should not be deleted or modified. Ensure that the operation being performed does not target these resources.

Summary

The ERROR_CORE_RESOURCE error code (5026, 0x13A2) is a specific technical indication encountered when attempting to modify a core resource in a Windows Failover Cluster environment. It highlights an attempt to delete or alter a component that is essential for the cluster's operation and cannot be changed through administrative actions.

This error serves as a safeguard against accidental modifications of critical resources, ensuring the stability and integrity of the cluster.