What does Windows error code 7067 (ERROR_CTX_CDM_DISCONNECT) mean?

ERROR_CTX_CDM_DISCONNECT

The Client Drive Mapping Service Has Disconnected on Terminal Connection.

ERROR_CTX_CDM_DISCONNECT is Win32 error 7067 (0x00001B9B) in legacy Remote Desktop Services and Terminal Services session handling.

What to verify

Verify whether the drive-mapping channel is closed and dependent handles are invalidated cleanly. Check session transition and reason, open redirected-file handles, and client and network state.

Likely causes

• the RDP session disconnected.
• client drive redirection was disabled.
• the virtual channel failed or was reset.
• a user logged off or reconnected from another client.

Troubleshooting steps

1. Collect session transition and reason.
2. Record open redirected-file handles.
3. Correlate client and network state with TerminalServices operational logs, session and user-configuration records, device or modem diagnostics, and the caller’s connection trace.

Handling, retry, and recovery

Treat the result as a notification, close or fail redirected I/O cleanly, and rebuild mappings only after a later connect event.

Related errors

ERROR_CTX_CDM_CONNECT announces establishment of the same virtual channel

Example

A process keeps a file open on a redirected drive when the user disconnects. Handling this event closes the stale handle and prevents later writes from targeting a vanished mapping.

References

• Microsoft: Win32 system error range containing this code
• Microsoft: Remote Desktop Services API
• Microsoft: WTS configuration classes
• Microsoft: WTSAPI32 reference