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copied!<p>I can't reproduce your problem. I copied and pasted your configuration snippet into a random <code>pom.xml</code> and running any phase posterior to <code>process-classes</code> triggers <a href="http://mojo.codehaus.org/emma-maven-plugin/emma-mojo.html" rel="nofollow noreferrer"><code>emma:emma</code></a> and the coverage report is generated as expected:</p> <pre> $ mvn clean process-classes [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building Test Project [INFO] task-segment: [clean, process-classes] [INFO] ------------------------------------------------------------------------ [INFO] [clean:clean {execution: default-clean}] [INFO] Deleting directory /home/pascal/tmp/test-project/target [INFO] [resources:resources {execution: default-resources}] [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 1 resource [INFO] [compiler:compile {execution: default-compile}] [INFO] Compiling 1 source file to /home/pascal/tmp/test-project/target/classes [INFO] Preparing emma:emma ... EMMA: runtime coverage data merged into [/home/pascal/tmp/test-project/coverage.ec] {in 93 ms} [INFO] [emma:emma {execution: default}] processing input files ... 2 file(s) read and merged in 3 ms writing [xml] report to [/home/pascal/tmp/test-project/target/site/emma/coverage.xml] ... writing [html] report to [/home/pascal/tmp/test-project/target/site/emma/index.html] ... [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------------ </pre> <p>Do you have unit tests in your project? Is the <code>coverage.em</code> file non empty? What happens if you run <code>emma:emma</code> on the command line? Does running mvn with the <code>-X</code> option give you any hint? Can you post some traces that would be helpful?</p> <p>As a side note, I wouldn't run <code>emma:emma</code> as part of the regular build personally. I would either run the <code>emma:emma</code> goal from the command line or configure the plugin and the reporting section as suggested in the <a href="http://mojo.codehaus.org/emma-maven-plugin/usage.html" rel="nofollow noreferrer">Usage</a> page. But that's another story and doesn't answer the question.</p>

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