ERROR_CLUSTER_INVALID_STRING_FORMAT - 5917 (0x171D)
An input string of characters is not in a valid format for the data it represents.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_CLUSTER_INVALID_STRING_FORMAT indicates that a string input provided to a Windows API function is not in the correct format for the data it represents. This can occur when attempting to manipulate cluster-related strings or identifiers within the Windows file system, particularly in scenarios involving distributed filesystems like Failover Clustering.
Error Details
This error typically arises from one of two primary causes:
- Invalid String Format: The string passed does not conform to the expected format for the operation being performed. For example, a string might be incorrectly formatted when attempting to specify a cluster resource name or identifier.
- Incorrect Object Type: The function expects a specific type of object (e.g., a path or an identifier) but receives a string that is not compatible with this expectation.
Usage Context
This error can occur in various scenarios, such as:
- Attempting to create or modify cluster resources using the Windows API.
- Performing operations on distributed filesystems where string inputs are required for resource identification.
Developer Interpretation
When encountering ERROR_CLUSTER_INVALID_STRING_FORMAT, developers should ensure that all strings passed to relevant functions adhere strictly to the expected format and type. This includes verifying the correctness of identifiers, paths, or any other string-based parameters used in cluster-related operations.
Related Errors
- ERROR_PATH_NOT_FOUND (3): Occurs when a path specified does not exist.
- ERROR_INVALID_PARAMETER (87): Indicates that one or more invalid parameters were passed to the function.
- ERROR_BAD_NETPATH (65): Suggests an issue with network paths, which might indirectly relate if the string input involves network resources.
FAQ
Q: What does ERROR_CLUSTER_INVALID_STRING_FORMAT mean?
A: It indicates that a string passed to a Windows API function is not in the correct format for the data it represents. This can occur when working with cluster-related operations and string inputs are incorrectly formatted or incompatible.
Q: How can I resolve this error?
A: Ensure that all strings used in cluster-related functions conform to the expected format. Verify the correctness of identifiers, paths, and other parameters passed to these functions.
Summary
ERROR_CLUSTER_INVALID_STRING_FORMAT is a specific error code indicating an issue with string formatting in cluster-related operations within Windows. Developers should carefully validate input strings to avoid this error and ensure compatibility with the required data formats.