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我正在使用 Ecplise 进行带有 Maven 和 Jsweet 的 Java 项目。在我的工作区中，我有两个项目：一个带有 servlet 的后端和一个前端。当我尝试仅编译前端以生成 html 页面的 js 文件时，我没有任何问题。我已将后端项目添加到前端项目的所需项目中，但出现此错误。这是什么意思？如何解决？

我已经在用 plugin 编译了clean install。

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.jsweet:jsweet-maven-plugin:2.3.0-SNAPSHOT:jsweet (generate-js) on project jsweet-quickstart: transpilation failed
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
Caused by: org.apache.maven.plugin.MojoExecutionException: transpilation failed
    at org.jsweet.AbstractJSweetMojo.transpile(AbstractJSweetMojo.java:541)
    at org.jsweet.JSweetMojo.execute(JSweetMojo.java:43)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
    ... 20 more
Caused by: org.apache.maven.plugin.MojoFailureException: transpilation failed with 3 error(s) and 0 warning(s)
    at org.jsweet.AbstractJSweetMojo.transpile(AbstractJSweetMojo.java:526)
    ... 23 more
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