RPC_S_UNSUPPORTED_TYPE - 1732 (0x6C4)
The universal unique identifier (UUID) type is not supported.
Updated: Feb 21, 2026
Technical Meaning
The error code RPC_S_UNSUPPORTED_TYPE with the numeric value 1732 and hexadecimal representation 0x6C4 signifies that a specific universal unique identifier (UUID) type is not supported by the system or service. This error typically arises when an operation involving a UUID fails due to the unsupported type.
Error Details
- Error Name: RPC_S_UNSUPPORTED_TYPE
- Numeric Code: 1732
- Hex Code: 0x6C4
- Short Description: Indicates that a UUID type is not supported by the system or service.
Common Causes
This error can occur due to several reasons, including:
- Invalid Parameter Values: The operation attempted to use an unsupported UUID type as a parameter.
- Incorrect Object Type: The object being operated on does not support the specified UUID type.
- Unsupported Operations: The system or service does not recognize or support the specific UUID type used in the operation.
Real-World Context
This error is commonly encountered when working with Remote Procedure Call (RPC) services, where operations involving UUIDs are performed. It can also appear in scenarios where custom or third-party applications rely on specific UUID types that are not recognized by the system.
Is This Error Critical?
The criticality of this error depends on the context and the operation being performed. If the unsupported type is essential for the operation, it could prevent the service from functioning correctly. However, if the operation can proceed with other supported types, the impact might be minimal.
How to Diagnose
To diagnose this issue, follow these steps:
- Review Operation Context: Determine which UUID type was expected and whether it is supported by the system or service.
- Validate Parameters: Ensure that all parameters passed to the operation are valid and correctly typed.
- Confirm Object Types: Verify that the object being operated on supports the specified UUID type.
- Check Limits or Constraints: Confirm that there are no inherent limitations or constraints preventing the use of the unsupported type.
How to Resolve
To resolve this issue, consider these practical steps:
- Correct Parameter Usage: Ensure that all parameters passed to the operation are correctly typed and supported by the system or service.
- Adjust Operation Context: If possible, adjust the context in which the operation is performed to use a supported UUID type.
- Restore Data: If data corruption or loss is suspected, restore from backups if available.
- Retry Operation with Valid Inputs: Attempt to perform the operation again with valid and correctly typed inputs.
Developer Notes
Developers should ensure that their applications handle various UUID types gracefully and provide fallback mechanisms when unsupported types are encountered. This can help maintain system stability and prevent critical failures.
Related Errors
- RPC_S_INVALID_BINDING: Indicates an invalid binding in the RPC operation, which might be related to incorrect UUID usage.
- RPC_S_UUID_LOCAL_ONLY: Suggests that a local-only UUID was used in a context where it is not supported.
FAQ
Q: What does RPC_S_UNSUPPORTED_TYPE mean?
A: It indicates that a specific UUID type is not supported by the system or service, causing an operation to fail.
Q: How can I prevent this error from occurring?
A: Ensure that all UUID types used in your operations are supported by the system or service and validate parameters before performing critical operations.
Summary
The RPC_S_UNSUPPORTED_TYPE error code is a specific indication of unsupported UUID types in Windows systems. Understanding its context, causes, and resolution can help developers and administrators diagnose and mitigate issues related to this error effectively.