json-rpc of bitcoin not working for testnet(curl command)

json-rpc of bitcoin not working for testnet(curl command)

I am trying this command to get transaction from bitcoin testnet:

curl  --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/plain;' http://username:password@IP:PORT/

And i am getting following error

{ "result":null, "error":{"code" :-32601, "message" : "Method not found"}, id:curltext}
http://bit.ly/2SmC8qk

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