Knowledge

ERROR_BAD_ACCESSOR_FLAGS - 773 (0x305)

The data provider was not able to interpret the flags set for a column binding in an accessor.

Updated: Feb 21, 2026

Technical Background

The ERROR_BAD_ACCESSOR_FLAGS error code is encountered when the Windows API encounters an issue with accessor flags used in column bindings. This error typically arises during data retrieval or manipulation operations where specific flags are expected to be set correctly.

Error Details

  • Error Name: ERROR_BAD_ACCESSOR_FLAGS
  • Numeric Code: 773 (0x305)
  • Short Description: Indicates that the data provider was unable to interpret the flags set for a column binding in an accessor.

Common Causes

The error is likely due to one of the following issues:

  • Invalid Parameter Values: The flags passed to the accessor are not recognized or valid by the data provider.
  • Incorrect Object Type: The operation context does not match the expected object type for the accessor flags.
  • Exceeding Limits: The number of flags or their combination exceeds the supported limits defined by the API.

Real-World Context

This error can occur in scenarios where complex data retrieval operations are performed, such as when working with structured query language (SQL) queries involving column bindings. It is particularly relevant for applications that interact with databases or other data sources through APIs that support advanced querying features.

Is This Error Critical?

The severity of this error depends on the context in which it occurs. If the operation is critical to the application's functionality, then addressing this issue promptly is important. However, if the operation is non-critical and can be retried or handled gracefully, then the impact may be minimal.

How to Diagnose

To diagnose the error, follow these steps:

  1. Review Operation Context: Ensure that the operation context matches the expected environment for the accessor flags.
  2. Validate Parameters: Check the values and types of the parameters passed to the accessor. Ensure they are within the valid range and correctly formatted.
  3. Confirm Object Types: Verify that the object type being accessed is compatible with the accessor flags used.
  4. Verify Input Data: Validate the input data to ensure it does not contain any corrupt or invalid information that could affect the operation.
  5. Check Limits or Constraints: Ensure that the number of flags and their combination do not exceed the supported limits defined by the API.

How to Resolve

To resolve the error, consider the following actions:

  • Correct Parameter Usage: Use valid parameter values and ensure they are correctly formatted according to the API specifications.
  • Adjust Operation Context: Modify the operation context if it does not match the expected environment for the accessor flags.
  • Restore Data: If data corruption is suspected, restore or correct the input data before retrying the operation.
  • Retry Operation with Valid Inputs: Attempt to perform the operation again with valid inputs and ensure that all parameters are correctly set.

Developer Notes

Developers should be aware of the specific flags supported by their API and ensure that they are used correctly in accessor operations. Proper validation of input parameters is crucial to avoid such errors.

Related Errors

  • ERROR_INVALID_PARAMETER: Occurs when an invalid parameter value is passed to a function or procedure.
  • ERROR_ACCESS_DENIED: Indicates that the application does not have sufficient access rights to perform the requested operation.
  • ERROR_BAD_ENVIRONMENT: Suggests that the environment in which the operation is being performed is not compatible with the API requirements.

FAQ

Q: What causes ERROR_BAD_ACCESSOR_FLAGS?

A: The error typically occurs due to invalid or unsupported accessor flags, incorrect object types, or exceeding supported limits for flag combinations.

Q: How can I prevent this error from occurring?

A: Ensure that all parameters passed to the accessor are valid and correctly formatted. Validate input data and check operation context against API requirements.

Summary

ERROR_BAD_ACCESSOR_FLAGS is a specific error indicating issues with accessor flags in column bindings. It requires careful parameter validation and adherence to API specifications to resolve effectively. Developers should be mindful of the supported limits and ensure that all operations are performed within valid contexts.