WARNING: Zero length file

[ericwuu]

use SFTP command line to upload, and sometimes I got this message in the log file
I am sure the test.txt is not zero size!

please help!
Eric

...
USER ewu12
331 Password Required for ewu12.
PASS **********
230 User ewu12 logged in.
SYST
215 Windows_NT
PASV
227 Entering Passive Mode (192,250,28,180,226,128).
LIST
Connect socket #456 to 192.250.28.180, port 57984...150 ASCII data.
226 Transfer complete.
CWD
250 CWD command successful
PASV
227 Entering Passive Mode (192,250,28,180,226,129).
LIST
Connect socket #456 to 192.250.28.180, port 57985...150 ASCII data.
226 Transfer complete.
CWD /
250 CWD command successful
TYPE A
200 type set
WARNING: Zero length file...test.txt - File not found...
QUIT
221 GOOD BYE
Total uploaded files: 0
Total uploaded data: 0
Total downloaded files: 0
Total downloaded data: 0

[ForumAdmin]

It may mean that the file is locked by another program.