Truffle V3.1.9, error running migrations

Question

Hey I'm updating my truffle project from V2 to V3, and I am getting this error after migrating:

sudo truffle migrate --network development
Using network 'development'.

Running migration: 1_initial_migration.js
  Deploying Migrations...
Error encountered, bailing. Network state unknown. Review successful transactions manually.
Error: Migrations error: contract binary not set. Can't deploy new instance.
    at Function.new (/usr/lib/node_modules/truffle/node_modules/truffle-contract/contract.js:324:15)
    at /usr/lib/node_modules/truffle/node_modules/truffle-migrate/node_modules/truffle-deployer/src/actions/deploy.js:25:29
    at process._tickCallback (internal/process/next_tick.js:103:7)

Here is my truffle.js file:

module.exports = {
networks: {
development: {
  host: "localhost",
  port: 8545,
  network_id: "*"
},
staging: {
  host: "localhost",
  port: 8546,
  network_id: 1337
},
ropsten: {
  host: "158.253.8.12",
  port: 8545,
  network_id: 3
}

} }

Deploy contracts file:

var Project = artifacts.require("./Project.sol");
var FundingHub = artifacts.require("./FundingHub.sol");

module.exports = function(deployer) {
  deployer.deploy(Project);
  deployer.deploy(FundingHub);
};

Answer 1

If you have one function that is an abstract function in your contract.

function addr(string _name) constant returns (address o_owner)

The whole contract is compiled as an abstract contract, so you will get this error message. It might be like me, that you never ment to write an abstract contract, but a but fast copy pasting of some code, and simsallabim, you have some abstract functions without thinking about it. So either add functions bodies to them or remove them.

Then your contract will compile.