I am generating jacoco report by using jacoco:report tag.
I am getting errors like : 

```
[jacoco:report] Classes in bundle 'Code Coverage Report' do no match with execution data. For report generation the same class files must be used as at runtime.
[jacoco:report] Execution data for class xxxxx does not match.
[jacoco:report] Execution data for class yyyyy does not match.

```

The ant report target looks like : 

```
<target name="report">
                <jacoco:report>
                        <executiondata>
                                <file file="${jacocoexec.dir}/${jacocoexec.filename}"/>
                        </executiondata>
                        <!-- the class files and optional source files ... -->
                        <structure name="Code Coverage Report">
                                <classfiles>
                                        <fileset file="./jar/abc.jar"/>
                                </classfiles>
                                <sourcefiles>
                                      <fileset dir="./code/src"/>
                                </sourcefiles>
                        </structure>
                        <!-- to produce reports in different formats. -->
                        <html destdir="${jacoco.report.dir}"/>
                </jacoco:report>
        </target>

```

The `abc.jar` so generated is by using `./code/src` only. Then why is it giving such errors. Any idea?