FTP Status Message Details?

[Ivan Moody <ivan.moody@xxxxxxxxxx>]

=====================================================
This message and any attachments to it are subject to copyright and are 
sent for the personal attention of the addressee.  It may include 
information which is legally privileged and exempt from disclosure.  
If you receive this communication in error, please advise us immediately.
=====================================================

Hi all,

I having a difficulty finding details for an FTP error message I am
receiving in a batch FTP.
The message appears intermittently when trying to get a certain file, see
following log excerpt:

> get myfilez99.div pfile99  
200 PORT command successful.
550 myfilez99.div: error 23. 

Now I know from the IBM manual that 550 is "Requested action was not taken;
the file was not found (or no access)".
So I think the file I'm trying to get is use when I'm trying to get it, but
I don't know what "error 23" means.
Does anyone know where I find the meaning of the "error numbers". 

TIA for any help :-)

Cheers,
Ivan

P.S. The local client is AS400 and the remote server is OS/2 (or so it says)
+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---