title: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.6.0:exec (default) on project ors: The parameter 'executable' is missing or invalid
body: <p>When i am trying to execute <strong>mvn -DskipTests=true -Passembly assembly:directory exec:exec</strong> command to make binary i am getting 
   <strong>Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.6.0:exec (default) on project ors: The parameter 'executable' is missing or invalid</strong> error. i have also applied <strong>Source Target 1.8</strong> inside configuration but still i am getting the same error.</p>
  
  <pre><code>&lt;profile&gt;
        &lt;id&gt;execute&lt;/id&gt;
        &lt;build&gt;
          &lt;plugins&gt;
            &lt;plugin&gt;
              &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
              &lt;artifactId&gt;exec-maven-plugin&lt;/artifactId&gt;
                &lt;executions&gt;
                    &lt;execution&gt;
                        &lt;goals&gt;&lt;goal&gt;java&lt;/goal&gt;&lt;/goals&gt;
                    &lt;/execution&gt;
                &lt;/executions&gt;
            &lt;configuration&gt;
            &lt;mainClass&gt;org.marketcetera.ors.OrderRoutingSystem&lt;/mainClass&gt;
            &lt;systemProperties&gt;
                &lt;systemProperty&gt;
                    &lt;key&gt;org.marketcetera.appDir&lt;/key&gt;
                    &lt;value&gt;src/test/cmd_exec&lt;/value&gt;
                &lt;/systemProperty&gt;
            &lt;/systemProperties&gt;
            &lt;classpathScope&gt;test&lt;/classpathScope&gt;
            &lt;/configuration&gt;
            &lt;/plugin&gt;
          &lt;/plugins&gt;
        &lt;/build&gt;
      &lt;/profile&gt;
  
      &lt;!-- Command-line execution of the ORS (with DB initialization). --&gt;
      &lt;profile&gt;
        &lt;id&gt;executeDBInit&lt;/id&gt;
        &lt;build&gt;
          &lt;plugins&gt;
            &lt;plugin&gt;
              &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
              &lt;artifactId&gt;exec-maven-plugin&lt;/artifactId&gt;
                &lt;executions&gt;
                    &lt;execution&gt;
                        &lt;goals&gt;&lt;goal&gt;java&lt;/goal&gt;&lt;/goals&gt;
                    &lt;/execution&gt;
                &lt;/executions&gt;
            &lt;configuration&gt;
          &lt;mainClass&gt;org.marketcetera.ors.DBInit&lt;/mainClass&gt;
          &lt;arguments&gt;
            &lt;argument&gt;org.marketcetera.ors.OrderRoutingSystem&lt;/argument&gt;
          &lt;/arguments&gt;
          &lt;systemProperties&gt;
            &lt;systemProperty&gt;
              &lt;key&gt;org.marketcetera.appDir&lt;/key&gt;
              &lt;value&gt;src/test/cmd_exec&lt;/value&gt;
            &lt;/systemProperty&gt;
          &lt;/systemProperties&gt;
          &lt;classpathScope&gt;test&lt;/classpathScope&gt;
            &lt;/configuration&gt;
            &lt;/plugin&gt;
          &lt;/plugins&gt;
        &lt;/build&gt;
      &lt;/profile&gt;
  
      &lt;!-- Command-line execution of the miniscule exchange. --&gt;
      &lt;profile&gt;
        &lt;id&gt;exchange&lt;/id&gt;
        &lt;build&gt;
          &lt;plugins&gt;
            &lt;plugin&gt;
              &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
              &lt;artifactId&gt;exec-maven-plugin&lt;/artifactId&gt;
                &lt;executions&gt;
                    &lt;execution&gt;
                        &lt;goals&gt;&lt;goal&gt;java&lt;/goal&gt;&lt;/goals&gt;
                    &lt;/execution&gt;
                &lt;/executions&gt;
            &lt;configuration&gt;
          &lt;mainClass&gt;org.marketcetera.ors.exchange.Main&lt;/mainClass&gt;
          &lt;arguments&gt;
            &lt;argument&gt;exchange.xml&lt;/argument&gt;
          &lt;/arguments&gt;
          &lt;systemProperties&gt;
            &lt;systemProperty&gt;
              &lt;key&gt;org.marketcetera.appDir&lt;/key&gt;
              &lt;value&gt;src/test/cmd_exec&lt;/value&gt;
            &lt;/systemProperty&gt;
          &lt;/systemProperties&gt;
          &lt;classpathScope&gt;test&lt;/classpathScope&gt;
            &lt;/configuration&gt;
            &lt;/plugin&gt;
          &lt;/plugins&gt;
        &lt;/build&gt;
      &lt;/profile&gt;
  
      &lt;!-- Security administration utility. --&gt;
      &lt;profile&gt;
        &lt;id&gt;cli&lt;/id&gt;
        &lt;build&gt;
          &lt;plugins&gt;
            &lt;plugin&gt;
              &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
              &lt;artifactId&gt;exec-maven-plugin&lt;/artifactId&gt;
                &lt;executions&gt;
                    &lt;execution&gt;
                        &lt;goals&gt;&lt;goal&gt;java&lt;/goal&gt;&lt;/goals&gt;
                    &lt;/execution&gt;
                &lt;/executions&gt;
            &lt;configuration&gt;
          &lt;mainClass&gt;org.marketcetera.ors.security.ORSAdminCLI&lt;/mainClass&gt;
          &lt;!-- -Dexec.args="-u admin ..." --&gt;
          &lt;systemProperties&gt;
            &lt;systemProperty&gt;
              &lt;key&gt;org.marketcetera.appDir&lt;/key&gt;
              &lt;value&gt;src/test/cmd_exec&lt;/value&gt;
            &lt;/systemProperty&gt;
          &lt;/systemProperties&gt;
          &lt;classpathScope&gt;test&lt;/classpathScope&gt;
            &lt;/configuration&gt;
            &lt;/plugin&gt;
          &lt;/plugins&gt;
        &lt;/build&gt;
      &lt;/profile&gt;
  
      &lt;!-- Assembly. --&gt;
      &lt;profile&gt;
        &lt;id&gt;assembly&lt;/id&gt;
        &lt;build&gt;
          &lt;plugins&gt;
            &lt;plugin&gt;
              &lt;artifactId&gt;maven-assembly-plugin&lt;/artifactId&gt;
                &lt;executions&gt;
                    &lt;execution&gt;
                        &lt;phase&gt;package&lt;/phase&gt;
                        &lt;goals&gt;&lt;goal&gt;single&lt;/goal&gt;&lt;/goals&gt;
                        &lt;configuration&gt;
                            &lt;formats&gt;&lt;format&gt;dir&lt;/format&gt;&lt;/formats&gt;
                            &lt;descriptors&gt;
                                &lt;descriptor&gt;src/main/assembly/assembly.xml&lt;/descriptor&gt;
                            &lt;/descriptors&gt;
                        &lt;/configuration&gt;
                    &lt;/execution&gt;
                &lt;/executions&gt;
            &lt;/plugin&gt;
            &lt;plugin&gt;
              &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
              &lt;artifactId&gt;exec-maven-plugin&lt;/artifactId&gt;
                &lt;executions&gt;
                    &lt;execution&gt;
                        &lt;phase&gt;package&lt;/phase&gt;
                        &lt;goals&gt;&lt;goal&gt;exec&lt;/goal&gt;&lt;/goals&gt;
                        &lt;configuration&gt;
                &lt;executable&gt;${perl.path}&lt;/executable&gt;
                            &lt;arguments&gt;
                                &lt;argument&gt;../tools/scripts/createScript.pl&lt;/argument&gt;
                                &lt;argument&gt;${project.build.directory}/${project.artifactId}&lt;/argument&gt;
                                &lt;argument&gt;ors&lt;/argument&gt;
                                &lt;argument&gt;org.marketcetera.ors.OrderRoutingSystem&lt;/argument&gt;
                                &lt;argument&gt;${project.build.directory}/${project.artifactId}&lt;/argument&gt;
                                &lt;argument&gt;orsadmin&lt;/argument&gt;
                                &lt;argument&gt;org.marketcetera.ors.security.ORSAdminCLI&lt;/argument&gt;
                            &lt;/arguments&gt;
                        &lt;/configuration&gt;
                    &lt;/execution&gt;
                &lt;/executions&gt;
            &lt;/plugin&gt;
          &lt;/plugins&gt;
        &lt;/build&gt;
      &lt;/profile&gt;
  </code></pre>