NNM Error adding a node to topology

[adige2005]

I am using a Solaris 2.8 environment with NNM release 6.20. When I try to add a node with the loadhosts command, I have this error message:

root@srvepi01:/opt/OV# loadhosts -p <<EOF
> 10.199.15.253 epi-7606-romaeur-a
> EOF


ERROR: Could not add node epi-7606-romaeur-a to topology: Requested object is unknown



Any suggestion, please?

Thanks a lot
Giuseppe