Oh, wait!

The problem is that you have a pair of extra quotes for the more options. It should be as follows: 

more => [qw(-o StrictHostKeyChecking=no)]

[download]

In reply to Re^3: Net-SFTP-Foreign: SSH slave exited unexpectedly with error code 255 by salva
in thread Net-SFTP-Foreign: SSH slave exited unexpectedly with error code 255 by toohoo

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