OpenSSH question : password prompt when scripting

On AIX 5.1 , using openssh, running as a user
I can do a key exchange, and will not be prompted
for a password :

$ sftp geles@xxxxxxxxxxxxxxxxxxxxxxx
Connecting to xxxasaprdftp.nc.ncs.com...
sftp> quit
$

But if I run the exact same command as a script,
it prompts me for a password:

[viper:/usr/local/bin] # su - pearson -c /usr/local/bin/get_Pearson
Connecting to xxxasaprdftp.nc.ncs.com...
gesles@xxxxxxxxxxxxxxxxxxxxxxx's password:


Has anyone seen this behavior in scripted sftp sessions ?

JYard
UCLA

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