Hi Krishna,
May be credential issue for slddsuser.
Try the below script
smdsetup managingconf hostname:"sapms://myhost.domain.corp" port:"81xx" user:"SMD_AGT" pwd:"xxxxxx"
for SP10:
user: SMD_AGT ( check in solman_setup , step 1)
port: 81<SCS instance no>
hostname : "sapms://<solman hostname>.domain.corp"
Rg,
Karthik