Knowledge

ERROR_CARDBUS_NOT_SUPPORTED - 724 (0x2D4)

The inserted CardBus device cannot be started because of a configuration error on "%hs".

Updated: Feb 21, 2026

Technical Background

The ERROR_CARDBUS_NOT_SUPPORTED error is a specific Windows error code that indicates the system cannot start a CardBus device due to a configuration issue. This error typically arises when the operating system detects an incompatible or unsupported CardBus device, or there are configuration errors preventing the device from functioning correctly.

Error Details

  • Error Name: ERROR_CARDBUS_NOT_SUPPORTED
  • Numeric Code: 724 (0x2D4)
  • Short Description: Indicates a configuration issue preventing the start of a CardBus device.

The error message includes a placeholder (%hs) that is replaced by the system with additional context, such as the specific configuration error encountered. This can provide more insight into why the device cannot be started.

Common Causes

  • Invalid Parameter Values: Incorrect or unsupported parameters passed during initialization of the CardBus device.
  • Incorrect Object Type: The operation attempted on a non-CardBus object, leading to an error.
  • Exceeding Limits: Attempting to use more resources than are available for CardBus devices.
  • Unsupported Operations: Trying to perform operations that are not supported by the specific CardBus device or its driver.

Real-World Context

The CardBus architecture is a legacy interface used in some older laptop computers and specialized hardware. The ERROR_CARDBUS_NOT_SUPPORTED error can occur when attempting to initialize such devices, especially if they are not fully compatible with the current system configuration or drivers.

Is This Error Critical?

This error is generally non-critical but may indicate a need for driver updates or device compatibility checks. It does not typically affect overall system stability unless it occurs frequently.

How to Diagnose

  1. Review Operation Context: Ensure the operation context is correct and that all necessary drivers are installed.
  2. Validate Parameters: Check the parameters passed during initialization of the CardBus device for correctness and compatibility.
  3. Confirm Object Types: Verify that the operations being performed are appropriate for CardBus devices.
  4. Verify Input Data: Ensure there are no corrupted data or invalid inputs affecting the operation.
  5. Check Limits or Constraints: Confirm that the system resources required by the CardBus device are available.

How to Resolve

  1. Correct Parameter Usage: Use correct and compatible parameters for initializing the CardBus device.
  2. Adjust Operation Context: Ensure the operation context is appropriate for the CardBus device.
  3. Restore Data: If data corruption is suspected, restore from a known good backup or reinitialize the device.
  4. Retry Operation with Valid Inputs: Attempt to start the CardBus device again with valid inputs and parameters.

Developer Notes

  • Ensure that all operations involving CardBus devices are performed within the constraints of supported hardware and software configurations.
  • Verify compatibility between the CardBus device, its drivers, and the operating system version.

Related Errors

FAQ

Q: What does ERROR_CARDBUS_NOT_SUPPORTED mean?

A: It indicates a configuration issue preventing the start of a CardBus device.

Q: How can I resolve this error?

A: Ensure correct parameter usage, verify operation context, and check for data corruption or resource limits.

Summary

The ERROR_CARDBUS_NOT_SUPPORTED error is specific to issues encountered when attempting to start a CardBus device. It indicates configuration errors that prevent the device from functioning correctly. By understanding the common causes and following diagnostic steps, developers can resolve this issue effectively.