Root of Tuscany binary distribution is - ${tuscany.home} Please use 'ant run-name-of-sample-contribution-to-run' for example, try one of 'ant sample-binding-sca-calculator-contribution' 'ant sample-binding-ws-calculator-contribution' 'ant sample-binding-rmi-calculator-contribution' 'ant sample-implementation-java-calculator-contribution' 'ant sample-implementation-java-calculator-async-contribution'