ERROR_CTX_CDM_CONNECT - 7066 (0x1B9A)
The Client Drive Mapping Service Has Connected on Terminal Connection.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_CTX_CDM_CONNECT with the numeric value 7066 and hexadecimal representation 0x1B9A indicates that a connection has been established by the Client Drive Mapping Service on a terminal session.
Error Details
This error is typically encountered in scenarios where client drive mapping operations are performed over a terminal connection. The Client Drive Mapping Service (CDM) manages the process of establishing and maintaining network drives for users, particularly in environments with remote desktop or terminal services.
Usage Context
The ERROR_CTX_CDM_CONNECT error code is relevant to developers working with terminal sessions and client drive mapping functionalities within Windows systems. It can be observed when a user attempts to map a network drive through a terminal session, such as Remote Desktop Protocol (RDP) or similar remote access tools.
Developer Interpretation
As a developer, this error should not be treated as an issue that requires immediate attention. Instead, it serves as a confirmation that the Client Drive Mapping Service has successfully connected to the terminal session and is ready to handle drive mapping operations. Developers can use this information to log successful connections or to implement additional logic based on the state of the CDM service.
Related Errors
ERROR_CTX_WINSTATION_NAME_INVALID(0x80092014): Indicates an invalid terminal session name.ERROR_CTX_CLIENT_QUERY_TIMEOUT(0x80092037): Occurs when a client query times out during the connection process.
FAQ
Q: What does ERROR_CTX_CDM_CONNECT indicate?
A: It indicates that the Client Drive Mapping Service has connected to a terminal session, allowing for drive mapping operations.
Q: Is this error critical?
A: No, it is not a critical error. It simply confirms successful connection of the CDM service in a terminal session context.
Summary
The ERROR_CTX_CDM_CONNECT error code (7066/0x1B9A) signifies that the Client Drive Mapping Service has successfully connected to a terminal session, enabling drive mapping operations. Developers can use this information for logging or additional logic without requiring specific troubleshooting actions.