Important Notice - Forums is archived
To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.

Vaadin lets you build secure, UX-first PWAs entirely in Java.
Free ebook & tutorial.
Maven install error Vaadin archetype application on STS
OK, I m having such an annoying time trying to set a new development enviroment as below:
Ubuntu 32 bits ( First I choose 64 bits but it have problems with XULRunner an dont display old designer)
STS Eclipse base on Neon, Version: 3.8.1.RELEASE
Vaadin plugin for eclipse 3.0.0 (Vaadin Designer Legacy)
Problem happen when tried to Run - Maven Install on a clean recently create project 7.7.0 (Latest at Sep 2016) it throws below errors. Thanks in advance:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building formularios 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- vaadin-maven-plugin:7.7.0:update-theme (default) @ formularios ---
[INFO] Updating theme VAADIN/themes/mytheme
[INFO] Widgetsets found from classpath:
[INFO] Addon styles found from classpath:
[INFO]
[INFO] Search took 4ms
[INFO] Theme "VAADIN/themes/mytheme" updated
[INFO]
[INFO] --- vaadin-maven-plugin:7.7.0:update-widgetset (default) @ formularios ---
[WARNING] GWT plugin is configured to detect modules, but none were found.
[INFO] No widgetsets found - generating AppWidgetset if necessary.
[INFO] Updating widgetset AppWidgetset
[INFO] Adding resource directory to command classpath: /home/slon/Documents/workspace/formularios/src/main/resources
[INFO] Adding resource directory to command classpath: /home/slon/Documents/workspace/formularios/target/generated-resources/gwt
[INFO] Using com.vaadin:vaadin-client version 7.7.0
[INFO] Using com.vaadin:vaadin-client-compiler version 7.7.0
[INFO] Widgetsets found from classpath:
[INFO] com.vaadin.DefaultWidgetSet in jar:file:/home/slon/.m2/repository/com/vaadin/vaadin-client/7.7.0/vaadin-client-7.7.0.jar!/
[INFO] Addon styles found from classpath:
[INFO]
[INFO] Search took 4ms
[INFO]
[INFO] --- vaadin-maven-plugin:7.7.0:compile-theme (default) @ formularios ---
[INFO] Updating theme VAADIN/themes/mytheme
[ERROR] Sep 09, 2016 9:42:33 AM com.vaadin.sass.internal.handler.SCSSErrorHandler severe
[ERROR] SEVERE: Import '../valo/valo.scss' in '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.scss' could not be found
[ERROR] Sep 09, 2016 9:42:33 AM com.vaadin.sass.internal.handler.SCSSErrorHandler severe
[ERROR] SEVERE: Mixin Definition: valo not found
[ERROR] Compiling theme "VAADIN/themes/mytheme" failed
org.codehaus.mojo.gwt.shell.JavaCommandException: Command [[
/bin/sh -c '/usr/lib/jvm/java-8-oracle/jre/bin/java' '-classpath' '/home/slon/Documents/workspace/formularios/src/main/webapp:/home/slon/Documents/workspace/formularios/target/classes:/home/slon/Documents/workspace/formularios/src/main/java:/home/slon/.m2/repository/javax/servlet/javax.servlet-api/3.0.1/javax.servlet-api-3.0.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-server/7.7.0/vaadin-server-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-sass-compiler/0.9.13/vaadin-sass-compiler-0.9.13.jar:/home/slon/.m2/repository/org/w3c/css/sac/1.3/sac-1.3.jar:/home/slon/.m2/repository/com/vaadin/external/flute/flute/1.3.0.gg2/flute-1.3.0.gg2.jar:/home/slon/.m2/repository/com/yahoo/platform/yui/yuicompressor/2.4.8/yuicompressor-2.4.8.jar:/home/slon/.m2/repository/rhino/js/1.7R2/js-1.7R2.jar:/home/slon/.m2/repository/com/vaadin/vaadin-shared/7.7.0/vaadin-shared-7.7.0.jar:/home/slon/.m2/repository/org/jsoup/jsoup/1.8.3/jsoup-1.8.3.jar:/home/slon/.m2/repository/com/vaadin/vaadin-push/7.7.0/vaadin-push-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/external/atmosphere/atmosphere-runtime/2.2.9.vaadin2/atmosphere-runtime-2.2.9.vaadin2.jar:/home/slon/.m2/repository/com/vaadin/external/slf4j/vaadin-slf4j-jdk14/1.6.1/vaadin-slf4j-jdk14-1.6.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-client-compiled/7.7.0/vaadin-client-compiled-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-themes/7.7.0/vaadin-themes-7.7.0.jar' 'com.vaadin.sass.SassCompiler' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.scss' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.css'
]] failed with status 1
at org.codehaus.mojo.gwt.shell.JavaCommand.execute(JavaCommand.java:327)
at com.vaadin.integration.maven.CompileThemeMojo.processTheme(CompileThemeMojo.java:68)
at com.vaadin.integration.maven.AbstractThemeMojo.execute(AbstractThemeMojo.java:43)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
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:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.289 s
[INFO] Finished at: 2016-09-09T09:42:33-06:00
[INFO] Final Memory: 17M/119M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.vaadin:vaadin-maven-plugin:7.7.0:compile-theme (default) on project formularios: Compiling theme "VAADIN/themes/mytheme" failed: Command [[
[ERROR] /bin/sh -c '/usr/lib/jvm/java-8-oracle/jre/bin/java' '-classpath' '/home/slon/Documents/workspace/formularios/src/main/webapp:/home/slon/Documents/workspace/formularios/target/classes:/home/slon/Documents/workspace/formularios/src/main/java:/home/slon/.m2/repository/javax/servlet/javax.servlet-api/3.0.1/javax.servlet-api-3.0.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-server/7.7.0/vaadin-server-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-sass-compiler/0.9.13/vaadin-sass-compiler-0.9.13.jar:/home/slon/.m2/repository/org/w3c/css/sac/1.3/sac-1.3.jar:/home/slon/.m2/repository/com/vaadin/external/flute/flute/1.3.0.gg2/flute-1.3.0.gg2.jar:/home/slon/.m2/repository/com/yahoo/platform/yui/yuicompressor/2.4.8/yuicompressor-2.4.8.jar:/home/slon/.m2/repository/rhino/js/1.7R2/js-1.7R2.jar:/home/slon/.m2/repository/com/vaadin/vaadin-shared/7.7.0/vaadin-shared-7.7.0.jar:/home/slon/.m2/repository/org/jsoup/jsoup/1.8.3/jsoup-1.8.3.jar:/home/slon/.m2/repository/com/vaadin/vaadin-push/7.7.0/vaadin-push-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/external/atmosphere/atmosphere-runtime/2.2.9.vaadin2/atmosphere-runtime-2.2.9.vaadin2.jar:/home/slon/.m2/repository/com/vaadin/external/slf4j/vaadin-slf4j-jdk14/1.6.1/vaadin-slf4j-jdk14-1.6.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-client-compiled/7.7.0/vaadin-client-compiled-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-themes/7.7.0/vaadin-themes-7.7.0.jar' 'com.vaadin.sass.SassCompiler' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.scss' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.css'
[ERROR] ]] failed with status 1
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException