Lab 4 Invoke Command Failing ("Chaincode registration failed")("Exited with 254")

Hello

I am trying to conduct Lab 4 but am stuck on the chaincode invocation step
From googling I've tried the following :
Restart network
Ensure package is installed correctly
Change name paramter in invoke command to PACKAGE_ID
Give absolute path to package command

Install commands used :

peer lifecycle chaincode package simple_chaincode --path /home/$USER/go/src/github.com/hyperledger/fabric-samples/lfd272/chaincodes/simple_chaincode --lang node --label simple_chaincode

peer lifecycle chaincode install simple_chaincode 

export PACKAGE_ID=simple_chaincode:5e11633859d9976c872a38b13521279adf32d14ba8bffa6e29da4b43adcde680 (textbook hash but in my env it corresponds to the correct ID generated by "chaincode install"

peer lifecycle chaincode approveformyorg -o localhost:7050--ordererTLSHostnameOverride orderer.example.com --channelIDmychannel--name simple_chaincode --version 1.0 --package-id$PACKAGE_ID --sequence 1--tls --cafile${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem 

peer lifecycle chaincode commit -o localhost:7050--ordererTLSHostnameOverride orderer.example.com --channelIDmychannel--name simple_chaincode --version 1.0 --sequence 1--tls --cafile${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem--peerAddresseslocalhost:7051 --tlsRootCertFiles${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses localhost:9051--tlsRootCertFiles${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt

peer lifecycle chaincode querycommitted --channelIDmychannel --namesimple_chaincode --cafile${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem


(This invoke command fails)

peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverrideorderer.example.com --tls --cafile${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem-C mychannel -nsimple_chaincode --peerAddresses localhost:7051 --tlsRootCertFiles${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses localhost:9051--tlsRootCertFiles${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt -c '{"function":"put","Args":["k","v"]}'

(Error Message) 

Error: endorsement failure during invoke. response: status:500 message:"error in simulation: failed to execute transaction ($HASH omitted for clarity): could not launch chaincode simple_chaincode:($HASH omitted for clarity): chaincode registration failed: container exited with 254"

Any guidance or insight would be appreciated =]

Thank you