12 is EOF signal. There's nothing wrong about it.

For Status code 1:
https://winscp.net/eng/docs/sftp_codes

Looking over my log files I have two questions:

1 - Can someone help me understand why it closed with code 12? The script is just calling close, so I want to make sure that all files downloaded correctly.

> 2013-03-27 15:45:18.273 Script: close
. 2013-03-27 15:45:18.275 Closing connection.
. 2013-03-27 15:45:18.276 Sending special code: 12
. 2013-03-27 15:45:18.281 Sent EOF message
. 2013-03-27 15:45:18.288 [Shell] Closing connection.
. 2013-03-27 15:45:18.289 [Shell] Sending special code: 12
. 2013-03-27 15:45:18.291 [Shell] Sent EOF message


2 - I see a lot of these in the log, but don't think it is an error. Is there a qay to suppress them?

> 2013-03-27 15:45:18.096 Type: SSH_FXP_OPEN, Size: 70, Number: 4040451
< 2013-03-27 15:45:18.116 Type: SSH_FXP_STATUS, Size: 24, Number: 4040196
. 2013-03-27 15:45:18.118 Discarding reserved response
< 2013-03-27 15:45:18.151 Type: SSH_FXP_HANDLE, Size: 13, Number: 4040451
> 2013-03-27 15:45:18.153 Type: SSH_FXP_FSTAT, Size: 13, Number: 4040712
> 2013-03-27 15:45:18.154 Type: SSH_FXP_READ, Size: 25, Number: 4040965
< 2013-03-27 15:45:18.193 Type: SSH_FXP_ATTRS, Size: 37, Number: 4040712
. 2013-03-27 15:45:18.195 Storing reserved response
< 2013-03-27 15:45:18.264 Status code: 1
. 2013-03-27 15:45:18.266 3 skipped SSH_FXP_WRITE, SSH_FXP_READ, SSH_FXP_DATA and SSH_FXP_STATUS packets.
> 2013-03-27 15:45:18.267 Type: SSH_FXP_CLOSE, Size: 13, Number: 4041476

Thanks,
Josh