Channel not created with test-network

Hi There,
All of a sudden, i am not able to bring up the network using below command

./network.sh up createChannel -ca -s couchdb

It is giving me an error of

scripts/createChannel.sh: line 40: osnadmin: command not found
Channel creation failed

Before giving this error it retries below command 4 times.
+ osnadmin channel join --channelID mychannel --config-block ./channel-artifacts/mychannel.block -o localhost:7053 --ca-file /home/sv/go/src/github.com/hyperledger/fabric-samples/test-network/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem --client-cert /home/sv/go/src/github.com/hyperledger/fabric-samples/test-network/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/tls/server.crt --client-key /home/sv/go/src/github.com/hyperledger/fabric-samples/test-network/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/tls/server.key

Any help would be appreciate.

Regards,
Sumit