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POexec-maven-plugin Error in Spring-Roo Generated GWT Application
 

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    <p>I am trying to generate a simple gwt application using spring-roo. Following is the contents of log.roo file:</p> <pre><code>project --projectName erp --topLevelPackage org.erp persistence setup --provider HIBERNATE --database MYSQL web gwt setup </code></pre> <p>After project generation, I run following command:</p> <pre><code>mvn clean package </code></pre> <p>And I receive following error:</p> <pre><code>[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2:exec (default) on project erp: Command execution failed. Process exited with an error: 255 (Exit value: 255) -&gt; [Help 1] </code></pre> <p>Following is the exec plugin configuration:</p> <pre><code>&lt;plugin&gt; &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt; &lt;artifactId&gt;exec-maven-plugin&lt;/artifactId&gt; &lt;version&gt;1.2&lt;/version&gt; &lt;executions&gt; &lt;execution&gt; &lt;phase&gt;process-classes&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;exec&lt;/goal&gt; &lt;/goals&gt; &lt;configuration&gt; &lt;id&gt;VerifyRequestFactoryInterfaces&lt;/id&gt; &lt;executable&gt;java&lt;/executable&gt; &lt;arguments&gt; &lt;argument&gt;-cp&lt;/argument&gt; &lt;classpath/&gt; &lt;argument&gt;com.google.web.bindery.requestfactory.apt.ValidationTool&lt;/argument&gt; &lt;argument&gt;${project.build.outputDirectory}&lt;/argument&gt; &lt;argument&gt;${project.groupId}.client.managed.request.ApplicationRequestFactory&lt;/argument&gt; &lt;/arguments&gt; &lt;/configuration&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; </code></pre> <p>What does error 255 supposed to mean? What is the use of exec plugin in this scenario? And how can I overcome this error?</p> <p>Thanks...</p>
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