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STATUS_THREAD_NOT_IN_PROCESS
The thread and process identifiers refer to different process ownership
Every Windows thread belongs to one process. This status means an operation that accepted both process and thread context found that the thread is not a member of the specified process. It is more precise than an invalid thread ID: the thread can exist, but the process/thread pairing is wrong.
Capture both IDs and verify the relationship with GetProcessIdOfThread or equivalent native information before performing the operation. Enumeration races can also cause stale pairings if a process exits and IDs are later reused. Do not repair the failure by substituting the current process unless the operation is genuinely intended for the current thread.
What to inspect
- Log target process ID and thread ID as one correlated pair.
- Verify thread ownership immediately before the state-changing operation.
- Investigate stale enumeration caches and ID reuse in delayed asynchronous work.
References
- Microsoft: OpenThread
- System Informer PHNT: process and thread Native API
- Microsoft Open Specifications: NTSTATUS values
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