Knowledge

DNS_ERROR_DATAFILE_PARSING - 9655 (0x25B7)

Failure while reading datafile for DNS zone.

Updated: Feb 21, 2026

Technical Background

The DNS_ERROR_DATAFILE_PARSING error code indicates a failure in the process of reading data from a file associated with a DNS zone. This error typically occurs during the operation of managing or updating DNS zones on a Windows system.

Error Details

  • Error Name: DNS_ERROR_DATAFILE_PARSING
  • Numeric Code: 9655 (0x25B7)
  • Short Description: Failure while reading datafile for DNS zone.

This error suggests that there was an issue with the file system or the integrity of the data stored in a file related to a DNS zone. The exact nature of the failure can vary, but it generally points to problems such as corrupted files, incorrect file types, or issues with the format of the data within the file.

Common Causes

  • Corrupted Data File: The file containing DNS zone information may be damaged or contain invalid data.
  • Incorrect Object Type: The operation attempted on a file was not appropriate for its type (e.g., attempting to read a directory as if it were a file).
  • Exceeding Limits: There might have been an attempt to process too much data, leading to a failure in the parsing or reading of the file.

Real-World Context

This error can occur during various operations involving DNS zone management, such as adding, modifying, or deleting records within a zone. It is important for administrators and developers to ensure that all files related to DNS zones are correctly formatted and not corrupted before performing these operations.

Is This Error Critical?

The criticality of this error depends on the specific context in which it occurs. If the operation was part of a critical task, such as updating a primary zone file, then the failure could have significant implications for network availability and DNS resolution.

How to Diagnose

To diagnose the issue, follow these steps:

  1. Review Operation Context: Ensure that the operation being performed is appropriate for the type of data involved.
  2. Validate Parameters: Check all parameters passed to the operation to ensure they are correct and valid.
  3. Confirm Object Types: Verify that the files or directories involved in the operation are of the expected types (e.g., ensuring a file is indeed a DNS zone file).
  4. Verify Input Data: Ensure that the data within the file is correctly formatted and not corrupted.
  5. Check Limits or Constraints: Confirm that the system has sufficient resources to handle the operation, such as memory or disk space.

How to Resolve

To resolve this issue, consider these steps:

  • Correct Parameter Usage: Ensure all parameters are used correctly according to the documentation.
  • Adjust Operation Context: If the context of the operation is incorrect, adjust it to match the expected requirements.
  • Restore Data: If the data file is corrupted, restore a backup or correct the file manually.
  • Retry Operation with Valid Inputs: Attempt to perform the operation again using valid and correctly formatted inputs.

Developer Notes

Developers should ensure that all operations involving DNS zone files are robust against potential errors. This includes validating input parameters, handling exceptions gracefully, and providing clear error messages to aid in diagnosis.

Related Errors

  • DNS_ERROR_FILE_NOT_FOUND: Indicates the file was not found during an operation.
  • DNS_ERROR_INVALID_DATAFILE: Suggests that the data within a file is invalid or improperly formatted.

FAQ

Q: What does DNS_ERROR_DATAFILE_PARSING mean?

A: It indicates a failure in reading a datafile associated with a DNS zone, suggesting issues such as corrupted files or incorrect file types.

Q: How can I prevent this error from occurring?

A: Regularly back up your DNS zone files and ensure that all operations are performed using valid parameters and appropriate context.

Summary

The DNS_ERROR_DATAFILE_PARSING error code is a specific technical issue related to the integrity of datafiles used in managing DNS zones. Understanding its causes, diagnosing it correctly, and taking appropriate steps to resolve it can help maintain the reliability and functionality of your DNS infrastructure.