ftp transfer problems - dropping data

I have a customer who is using our software who is having problems
retrieving batches of files over ftp. (Our software has its own ftp
client code).

A review of the ftp log on our side shows it is dropping characters:

=== Log snippet =====
250 CWD command successful.
TYPE I
200 Type set to I.
PORT 172,16,1,33,83,226
200 PORT command successful.
RETR G2004-01-09_05-00-55_to_2004-01-10_04-08-25.dat
500 'TR G2004-01-09_05-00-55_to_2004-01-10_04-08-25.dat': command not
understood
======== End Snippet =====

You can see that it loses the 'RE' portion of 'RETR' when the server
echo's back the instruction. We have 1000's of customers who use our
software without problem so this is unique to his setup. I tried
making
delays between requests but that has not really helped. Any clues as
to
the dropped data?

Roger Dunn <(E-Mail Removed)> wrote:
> I have a customer who is using our software who is having problems
> retrieving batches of files over ftp. (Our software has its own ftp
> client code).

Why reinvent this particular wheel? There are plenty of libraries for
that.

> A review of the ftp log on our side shows it is dropping characters:

> RETR G2004-01-09_05-00-55_to_2004-01-10_04-08-25.dat
> 500 'TR G2004-01-09_05-00-55_to_2004-01-10_04-08-25.dat': command not
> understood

I don't know. You will have to debug your own code ;^)

--
Cameron Kerr
(E-Mail Removed) : http://nzgeeks.org/cameron/
Empowered by Perl!

>
> Why reinvent this particular wheel? There are plenty of libraries for
> that.
>

Yes, I am using a library. But that does not explain it away...