What does Windows error code 5940 (ERROR_CLUSTER_SINGLETON_RESOURCE) mean?

ERROR_CLUSTER_SINGLETON_RESOURCE

ERROR_CLUSTER_SINGLETON_RESOURCE means the cluster allows only one instance of this resource type. Creating a second independent instance is not supported by that resource type.

Locate the existing singleton instance and determine whether the new workload should depend on or reuse it. If isolation is required, confirm that the resource type supports a different architecture rather than creating an unsupported duplicate.

What to check

• List existing resources of the same type and determine which one already owns the required function.
• Check whether the new configuration should reuse the existing resource rather than create another one.
• Read the resource type documentation before attempting to bypass the restriction.

Get-ClusterResource | Group-Object ResourceType | Sort-Object Count -Descending

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