RA FTP jobs fail with "channel is not opened"

Document ID : KB000100316
Last Modified Date : 06/06/2018
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Issue:
RA FTP job with Solution 4.0.4 and 4.0.5 faile with the following error message in the report:
 
channel is not opened.
com.uc4.ftpjob.DataTransferException: Connection
exception.
    at com.uc4.transfer.CITSFTPImpl.<init>(CITSFTPImpl.java:222)
    at com.uc4.ftpjob.connections.ConnectionFactory$1.run(ConnectionFactory.java:70)
    at java.lang.Thread.run(Unknown Source)
Caused by: com.jcraft.jsch.JSchException: channel is not opened.
    at com.jcraft.jsch.Channel.sendChannelOpen(Channel.java:765)
    at com.jcraft.jsch.Channel.connect(Channel.java:151)
    at com.jcraft.jsch.Channel.connect(Channel.java:145)
    at com.uc4.transfer.CITSFTPImpl.<init>(CITSFTPImpl.java:205)
    ... 2 more

It affects SFTP and seems to be dependent on the SFTP-Server. I.e. it does not happen for every system and every RA FTP Job.
Cause:
The root cause is still under investigation by CA development
Resolution:
The root cause is still under investigation by CA development

Workaround: User RA FTP Solution 4.0.1