Knowledge

ERROR_BAD_THREADID_ADDR - 159 (0x9F)

The address for the thread ID is not correct.

Updated: Feb 21, 2026

Technical Background

The ERROR_BAD_THREADID_ADDR is a specific Windows error code indicating that the address for the thread identifier (TID) is incorrect. This error typically arises during API calls where the TID parameter is expected but not correctly provided.

Error Details

  • Error Name: ERROR_BAD_THREADID_ADDR
  • Numeric Code: 159 (0x9F)
  • Short Description: The address for the thread ID is not correct.

This error suggests that a function or API call was made with an invalid or incorrect TID parameter. It can occur in various contexts, such as when working with threads, synchronization primitives, or other APIs that require accurate thread identification.

Common Causes

  • Invalid Parameter Values: The provided TID is not valid or does not point to a correct memory address.
  • Incorrect Object Type: The operation was performed on an object type that does not support the use of TIDs in the context where it was expected.
  • Exceeding Limits: The system may have limitations on the number of threads, and attempting to exceed these limits can result in this error.

Real-World Context

This error is commonly encountered when dealing with multithreading operations or synchronization mechanisms. For instance, if a function expects a TID but receives an invalid address, it will fail and return ERROR_BAD_THREADID_ADDR.

Is This Error Critical?

The criticality of this error depends on the context in which it occurs. In most cases, it is not fatal to the system but can indicate issues with thread management or synchronization that need to be addressed.

How to Diagnose

  1. Review Operation Context: Ensure that the operation being performed is appropriate for multithreading and synchronization.
  2. Validate Parameters: Check the TID parameter passed to the function to ensure it points to a valid memory address.
  3. Confirm Object Types: Verify that the object type supports the use of TIDs in the context where they are expected.
  4. Verify Input Data: Ensure that all input data, including thread identifiers, is correctly initialized and not corrupted.
  5. Check Limits or Constraints: Confirm that the number of threads does not exceed system limits.

How to Resolve

  1. Correct Parameter Usage: Ensure that the TID parameter passed to functions is valid and points to a correct memory address.
  2. Adjust Operation Context: If the operation context is incorrect, adjust it to ensure compatibility with multithreading or synchronization requirements.
  3. Restore Data: If data corruption is suspected, restore the thread identifiers or other relevant data.
  4. Retry Operation with Valid Inputs: Attempt to perform the operation again with valid inputs if the issue persists after initial checks.

Developer Notes

When working with threads and synchronization in Windows, it is crucial to ensure that all parameters, especially TIDs, are correctly initialized and validated before passing them to functions. This error can often be avoided by thorough parameter validation and careful management of thread identifiers.

Related Errors

  • ERROR_INVALID_PARAMETER: Occurs when an invalid parameter is passed to a function.
  • ERROR_THREAD_NOT_FOUND: Indicates that the specified thread was not found in the system.
  • ERROR_BAD_ARGUMENTS: Occurs when one or more arguments are incorrect for a function call.

FAQ

Q: What does ERROR_BAD_THREADID_ADDR mean?

A: It indicates an invalid address for the thread ID parameter passed to a function. Ensure that all parameters, especially TIDs, are correctly initialized and validated before passing them to functions.

Q: How can I prevent this error from occurring?

A: Validate all input parameters, ensure correct initialization of thread identifiers, and verify object types support the operations being performed.

Summary

ERROR_BAD_THREADID_ADDR is a specific error code indicating an invalid address for the thread ID parameter. It is important to validate all inputs and manage threads correctly to avoid this issue. Proper validation and management of TIDs can help prevent such errors in multithreading and synchronization operations.