ERROR_MOUNT_POINT_NOT_RESOLVED - 649 (0x289)
The create operation failed because the name contained at least one mount point which resolves to a volume to which the specified device object is not attached.
Updated: Feb 21, 2026
Technical Meaning
This error code indicates that a file system operation, specifically a create operation, failed due to the presence of one or more mount points in the specified path. A mount point is a directory that has been mapped to another location on the file system, often used for network drives or virtual directories.
Error Details
The error ERROR_MOUNT_POINT_NOT_RESOLVED (649) occurs when an attempt to create a file or directory fails because one of the specified mount points in the path cannot be resolved. This means that the volume associated with the mount point is not currently attached, or there is some issue preventing the resolution of the mount point.
Usage Context
This error typically arises during operations such as creating files or directories on a network share or a virtual directory where mount points are involved. The operation fails because it cannot resolve the path to the target volume due to an unattached mount point, which could be caused by various factors including network connectivity issues, device disconnection, or system configuration problems.
Developer Interpretation
Developers should interpret this error as a sign that the specified path contains at least one mount point that is not currently accessible. This can affect operations such as file creation, directory creation, and other file system manipulations that rely on the existence of specific paths. Developers must ensure that all mount points in the path are correctly configured and attached before performing these operations.
Related Errors
ERROR_PATH_NOT_FOUND(3)ERROR_INVALID_NAME(123)ERROR_BAD_NETPATH(67)
These errors can provide additional context or occur concurrently with ERROR_MOUNT_POINT_NOT_RESOLVED, depending on the specific circumstances of the file system operation.
FAQ
Q: What causes this error?
A: This error typically occurs when a mount point in the path is not attached to its corresponding volume, which can be due to network disconnection or device issues.
Q: How can I resolve this issue?
A: Ensure that all necessary devices and network connections are properly configured and reattach any unmounted volumes before performing file system operations.
Summary
The ERROR_MOUNT_POINT_NOT_RESOLVED error (649) indicates a failure in creating files or directories due to unresolved mount points. Developers should verify the configuration of mount points and ensure that all necessary devices are attached before attempting such operations.