I've deployed Hyperledger fabric 1.2.0 using Kubernetes on AWS consisting of 1 orderer, 2 org each containing 2 peers 1 cli and 1 ca. I am able to create a channel and join them as well as install chaincode but when I try to instantiate the chaincode it gives following error:

peer chaincode instantiate -o orderer0.orgorderer1:7050 -C mychannel -n test -v 2.0 -c '{"Args":["init","a", "100", "b","200"]}'

Error: could not assemble transaction, err Proposal response was not successful, error code 500, msg failed to execute transaction 026ff5f4d1e5c3a0cb7a60f4768e327041396a50134375ba6ba8c8066ecb21f9: error starting container: error starting container: Failed to generate platform-specific docker build: could not decode url: ChaincodeSpec's path/URL invalid.