[ERROR] 'build.plugins.plugin[org.apache.maven.plugins:maven-assembly-plugin].dependencies.dependency.version' for de.monticore:mc-assemblies:jar must be a valid version but is '${mc.grammars.assembly.version}'. @ line 160, column 34 [ERROR] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-source-plugin must be a valid version but is '${source.plugin}'. @ line 187, column 26 [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/ProjectBuildingException ERROR: Job failed: exit code 1