> For the complete documentation index, see [llms.txt](https://cover-docs.diffblue.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cover-docs.diffblue.com/features/output-codes/working-with-output-codes.md).

# Working with output codes

Some useful hints and tips to help resolve a range of output codes.

<table data-view="cards"><thead><tr><th></th><th data-hidden></th><th data-hidden></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>E020</strong> - Failed to start up analysis service</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-e020.md">Working with code E020</a></td></tr><tr><td><strong>E057 to E065</strong> - Analysis service issue</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-codes-e057-to-e065.md">Working with codes E057 to E065</a></td></tr><tr><td><strong>E085</strong> - Attempt to compile a test as Groovy</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-e085.md">Working with code E085</a></td></tr><tr><td><strong>R005</strong> - Unable to load class</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r005.md">Working with code R005</a></td></tr><tr><td><strong>R006</strong> - Static initializer failed</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r006.md">Working with code R006</a></td></tr><tr><td><strong>R008</strong> - Failed to instantiate class under test</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r008.md">Working with code R008</a></td></tr><tr><td><strong>R011</strong> - Sandboxing policy violation</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r011.md">Working with code R011</a></td></tr><tr><td><strong>R012</strong> - JNI sandbox policy violation</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r012.md">Working with code R012</a></td></tr><tr><td><strong>R013</strong> - No inputs found that don't throw a trivial exception</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r013.md">Working with code R013</a></td></tr><tr><td><strong>R026</strong> - Failed to create Spring context</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r026.md">Working with code R026</a></td></tr><tr><td><strong>R031</strong> - Method may be time-sensitive</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-r031.md">Working with code R031</a></td></tr><tr><td><strong>V003</strong> - Tests discarded during validation</td><td></td><td></td><td></td><td><a href="/features/output-codes/working-with-output-codes/working-with-code-v003.md">Working with code V003</a></td></tr></tbody></table>