Knowledge

ERROR_OFFSET_ALIGNMENT_VIOLATION - 327 (0x147)

The command specified a data offset that does not align to the device's granularity/alignment.

Updated: Feb 21, 2026

Technical Background

The error code ERROR_OFFSET_ALIGNMENT_VIOLATION indicates that a command or operation specified a data offset that does not align to the device's alignment granularity. This is a parameter depth error, meaning it relates directly to the validation and constraints of input parameters.

Error Details

This error typically occurs when an application attempts to access memory or perform operations on hardware where the specified data offset does not meet the required alignment requirements. Alignment refers to the requirement that certain types of data must be stored at specific byte offsets within a structure or buffer, often for performance reasons related to cache behavior and processor architecture.

Common Causes

  • Invalid Parameter Values: The application provided an invalid data offset that does not align with the device's alignment requirements.
  • Incorrect Object Type: The operation was performed on an object type that requires specific alignment, but the input did not meet this requirement.
  • Exceeding Limits: The operation attempted to access memory or perform operations beyond the supported alignment granularity of the device.

Real-World Context

This error can occur in various scenarios where precise data alignment is critical. For example, when accessing hardware registers, performing DMA (Direct Memory Access) operations, or handling certain types of I/O operations that require strict alignment to function correctly.

Is This Error Critical?

The severity of this error depends on the context in which it occurs. If an application encounters this error during a critical operation, it may result in failure of the operation and potentially lead to system instability or data corruption. However, if the error is encountered in less critical operations, it might only cause the operation to fail without significant impact.

How to Diagnose

To diagnose this issue, follow these steps:

  1. Review Operation Context: Ensure that the operation being performed is appropriate for the device or hardware involved.
  2. Validate Parameters: Verify that all input parameters, particularly data offsets, meet the required alignment requirements.
  3. Confirm Object Types: Confirm that the object types being operated on are compatible with the expected alignment constraints.
  4. Verify Input Data: Check if any input data might be causing misalignment issues.
  5. Check Limits or Constraints: Ensure that no operations exceed the supported alignment granularity of the device.

How to Resolve

To resolve this issue, consider these practical steps:

  1. Correct Parameter Usage: Adjust the parameters used in the operation to ensure they meet the required alignment constraints.
  2. Adjust Operation Context: Modify the context or environment in which the operation is being performed if necessary.
  3. Restore Data: If data corruption is suspected, restore the data from a known good backup or source.
  4. Retry Operation with Valid Inputs: Attempt to perform the operation again using valid and correctly aligned inputs.

Developer Notes

When developing applications that interact with hardware or perform low-level operations, it is crucial to ensure that all input parameters meet the required alignment constraints. This can be achieved by carefully validating input data and ensuring that any operations performed are compatible with the device's alignment requirements.

Related Errors

  • ERROR_INVALID_PARAMETER: A more general error indicating an invalid parameter was provided.
  • ERROR_NOT_ENOUGH_MEMORY: An error related to insufficient memory, which might indirectly cause issues if it leads to incorrect data handling.

FAQ

Q: What does the error code 327 (0x147) mean?

A: The error code 327 indicates that a command specified a data offset that does not align to the device's granularity/alignment requirements.

Q: How can I prevent this error from occurring?

A: Ensure that all input parameters, particularly data offsets, meet the required alignment constraints. Validate object types and verify that operations are performed within supported limits.

Summary

The ERROR_OFFSET_ALIGNMENT_VIOLATION is a specific parameter depth error indicating an invalid data offset that does not align to the device's granularity/alignment requirements. Diagnosing and resolving this issue involves validating parameters, confirming object types, and ensuring alignment constraints are met. This error can be critical depending on the context in which it occurs.