#25089 1363077870.00000 _do_io: _do_io select(-,-,-, undef) #25089 1363077870.00000 _do_io: _do_io read sysread: 27, total read: 2 +8, $!: 50 6c 65 61 73 65 20 74 79 70 65 20 27 79 65 73 27 20 6f 72 20 27 6e 6 +f 27 3a 20 | Please type 'yes' or 'no': #25089 1363077870.00000 _set_status: _set_status code: 5, str: Bad mes +sage

First off, you haven't shown us any Perl code for us to see what you are attempting to do.

That said: I have quoted some of the trace that you supplied and in there is the smoking gun so to speak. It would appear that serverB is not in the known_hosts file for the userid that is running the script. Very simple fix:

1. Log in as the userid that is running the script
2. SSH from that userid to hostB as the userid SFTP is logging in as.
3. When SSH asks you to accept the key say "yes."

That will cause the known_hosts file to be populated with the public key of the remote host

Works fine... lasta a long time...