ERROR_POSSIBLE_DEADLOCK - 1131 (0x46B)
A potential deadlock condition has been detected.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_POSSIBLE_DEADLOCK error is a generic return code indicating that a potential deadlock condition has been detected. Deadlocks are situations where two or more processes are waiting for each other to release resources, resulting in an indefinite wait state.
Error Details
This error typically occurs when the Windows operating system detects a scenario that could lead to a deadlock but does not conclusively determine that one is occurring. It serves as a warning mechanism rather than a definitive failure condition.
Usage Context
The ERROR_POSSIBLE_DEADLOCK can be returned by various system components and APIs, particularly those involving resource allocation or synchronization mechanisms such as mutexes, semaphores, or critical sections.
Developer Interpretation
When this error is encountered, it suggests that the application or driver should take steps to prevent a deadlock from occurring. Developers should review their code for potential deadlocks, especially in scenarios where multiple threads or processes are accessing shared resources.
Related Errors
ERROR_DEADLOCK(186): A definitive deadlock has been detected and the operation is terminated.ERROR_NO_SYSTEM_RESOURCES(8): Insufficient system resources exist to complete the requested service.
FAQ
Q: What does the ERROR_POSSIBLE_DEADLOCK error mean?
A: It indicates a potential deadlock condition that could arise in your application or driver. This is not a definitive failure but rather a warning to prevent deadlocks from occurring.
Q: How can I handle this error in my code?
A: Review and modify the synchronization logic in your application to avoid situations where multiple threads might wait for each other indefinitely. Consider using timeouts, retry mechanisms, or alternative synchronization primitives.
Summary
The ERROR_POSSIBLE_DEADLOCK is a generic warning that indicates a potential deadlock condition has been detected by the Windows operating system. Developers should take proactive measures to prevent deadlocks in their applications and drivers.