ERROR_CRM_PROTOCOL_ALREADY_EXISTS - 6710 (0x1A36)
The RM tried to register a protocol that already exists.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_CRM_PROTOCOL_ALREADY_EXISTS error indicates that an attempt was made to register a protocol with the Resource Management (RM) system, but the protocol identifier is already in use. This error typically occurs during the initialization or configuration of network protocols or services.
Error Details
This error code is returned by the Windows API when the RM subsystem detects that a protocol registration request conflicts with an existing entry. The RM system maintains a registry of all registered protocols, and any attempt to register a duplicate identifier will result in this error.
Usage Context
The ERROR_CRM_PROTOCOL_ALREADY_EXISTS error can occur in various scenarios where network protocols or services are being configured or initialized. Common contexts include:
- Network protocol registration during system startup or service initialization.
- Configuration changes that involve adding or modifying network protocols.
- Custom applications or drivers that interact with the RM subsystem to register new protocols.
Developer Interpretation
When encountering this error, developers should ensure that all protocol identifiers are unique and correctly specified. The error indicates a conflict in the registration process, which can be resolved by either changing the identifier of the conflicting protocol or ensuring that no other component is using the same identifier.
Related Errors
ERROR_CRM_PROTOCOL_NOT_FOUND(6709): Indicates that a requested protocol could not be found.ERROR_CRM_REGISTRY_CORRUPT(6712): Suggests issues with the RM registry, which may require repair or reconfiguration.ERROR_CRM_SERVICE_NOT_RUNNING(6714): Implies that the RM service is not active and cannot process protocol registration requests.
FAQ
Q: What does the ERROR_CRM_PROTOCOL_ALREADY_EXISTS error mean?
A: It indicates a conflict in the registration of network protocols, where an attempt was made to register a protocol identifier that already exists.
Q: How can I resolve this error?
A: Ensure that all protocol identifiers are unique and correctly specified. Check for any conflicting entries or services using the same identifier and make necessary adjustments.
Summary
The ERROR_CRM_PROTOCOL_ALREADY_EXISTS error is a specific technical issue related to network protocol registration in the Windows environment. It highlights conflicts in the RM subsystem's registry of protocols, requiring careful identification and resolution of duplicate identifiers.