Hi,

I'm not sure if I'm missing something or if this is a bug. I have managed to 
create an aggregate report of my many modules and it is all working fine. 
However, I wanted to add a check on this aggregate report to ensure the overall 
coverage is at a minimum. This is the error that I'm getting:

[INFO] --- jacoco-maven-plugin:0.8.4:check (default-check) @ jacoco-report ---
[INFO] Skipping JaCoCo execution due to missing classes 
directory:<project_dir>/jacoco-report/target/classes

My project is laid out like so:

Root
|--module1
|--module2
...
|--jacoco-report

Below is a snippet of the jacoco-report/pom.xml:

    <properties>
        
<code.coverage.project.folder>${basedir}/../</code.coverage.project.folder>
    
<code.coverage.overall.data.folder>${basedir}/../target/</code.coverage.overall.data.folder>
    
<code.coverage.overall.data.file>${code.coverage.overall.data.folder}/aggregate.exec</code.coverage.overall.data.file>
    </properties>

    <dependencies>
        <dependency>
            <groupId>group_name</groupId>
            <artifactId>module1</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        ...
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <id>report-aggregate</id>
                        <phase>verify</phase>
                        <goals>
                            <goal>report-aggregate</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>merge-results</id>
                        <phase>verify</phase>
                        <goals>
                            <goal>merge</goal>
                        </goals>
                        <configuration>
                            <fileSets>
                                <fileSet>
                                    
<directory>${code.coverage.project.folder}</directory>
                                    <includes>
                                        <include>**/target/jacoco.exec</include>
                                    </includes>
                                </fileSet>
                            </fileSets>
                            
<destFile>${code.coverage.overall.data.file}</destFile>
                        </configuration>
                    </execution>
                    <execution>
                        <id>default-check</id>
                        <phase>verify</phase>
                        <goals>
                            <goal>check</goal>
                        </goals>
                        <configuration>
                            
<dataFile>${code.coverage.overall.data.file}</dataFile>
                            <rules>
                                <rule>
                                    <element>BUNDLE</element>
                                    <limits>
                                        <limit>
                                            <counter>COMPLEXITY</counter>
                                            <value>COVEREDRATIO</value>
                                            <minimum>50%</minimum>
                                        </limit>
                                    </limits>
                                </rule>
                            </rules>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

Do I need to copy the class files into the jacoco-report/target/classes/ 
directory? I assumed they would be copied over.

The report is correctly generated and I can click down to see various classes 
and their coverage.

Thanks for your help!

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