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000033_news@columbia.edu _Thu Sep 21 10:38:37 2000.msg
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From: fdc@columbia.edu (Frank da Cruz)
Subject: Re: File transfer resulting in protocol error
Date: 21 Sep 2000 14:37:41 GMT
Organization: Columbia University
Message-ID: <8qd6fl$dkg$1@newsmaster.cc.columbia.edu>
To: kermit.misc@columbia.edu
In article <kxmy5.868$mC.44077@monger.newsread.com>,
Eric Macan <eric@dentech.com> wrote:
: I occassionally receive "Protocol Error: Too many retries" after a send
: and was wondering what might be the cause of this. We are using C-Kermit
: 6.0.192 SCO Openserver R5...
:
7.0 is current:
http://www.columbia.edu/kermit/ckermit.html
: ... on a SCO box running 3.2v5.0.2 and are sending a file zipped with
: pkzip25 daily to a mainframe via dialup with a external modem on a COM
: port. Is it an issue on the remote end or on the box initiating the
: transfer?.
:
The message means what it says. It tried to send a packet, did not get
an acknowledgement, tried again, still did not get an acknowledgement,
and so on for many repetitions.
: The transact.log ends stating incomplete: kept and the remote
: location does not receive the file. Are there any settings I can tweak
: with the Kermit to avoid this? The remote file system type is MVS/TSO.
:
The C-Kermit manual includes an entire chapter on troubleshooting
file-transfer problems. The usual causes are lack of adequate flow
control at one or more junctures along the communication path and
excessive noise on the connection. You can address these in many ways:
fix the flow control, reduce the packet length, etc.
- Frank