We have few interfaces in production which transfers scan documents from one FTP site to another. After the scan documents are successully transferred they are moved to the archive directory so that they are not picked up again in next run.
Sometimes FTP server returns “426 Connection closed; transfer aborted.” error to wM when its trying to put the files on target FTP. Though the frequency of this issue is one in 100. When I look into the target FTP, the file are actually transferred, but for the flow services exception is being returned which causes the files to be transferred again in next run.
Why is FTP/webMethods behaving in this weird way, even when the put operation is successfull there is an exception thrown by the flow servcies.
We dont have any fire wall between webMethods and target FTP.
Any clue as why this is happening ?