John, I Googled '"out of band" FTP' and got a link to RFC 0529. I'm no expert in IP networking, but to my reading, out-of-band is sort of an interrupt caused by the ABOR. So, why did the client send the abort? Could it be the timeout value had passed? I think the default is 120 seconds, but it can be overridden.
If this is a batch job, you might check your EZA1617I messages in the aborted runs and see if your transfer rate was running really slow at the time. We've found IP traffic to be so flaky that we coded a proc that runs a REXX that attempts the FTP x number of times (4 as a default), sleeping 30 seconds between attempts (adapted from something we acquired from Terry Linsley somehow -- thanks, Terry). And all our batch jobs that need to FTP use the FTPRETRY proc - most of them are successful on the first attempt, but many of them wind up taking 2 or 3 attempts. And when the programmers discover a site they are FTP'ing to that seems to fail a lot, they generally increase the timeout value too. Anyway, our shop has viewed this unreliability in FTP transfers as SOP (or WAD) and have adapted. HTH, Greg Shirey Ben E. Keith Company -----Original Message----- From: IBM Mainframe Discussion List On Behalf Of Chase, John Sent: Friday, May 18, 2007 8:48 AM Trying to understand the explanation for this FTP error: 426 Connection closed; transfer aborted. The manual says only this: The FTP server received an Out Of Band ABOR subcommand from the FTP client requesting that the data transfer in progress end. The FTP server aborted the data transfer. The client in this context is z/OS 1.7; server is an AIX machine in our local network. What is an "Out Of Band" condition, and why would the z/OS FTP program (client) originate it? BTW, the same FTP job finally succeeded after four of the above aborts. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
