Doxygen Graphviz Failed: Troubleshooting Guide

When running Doxygen, you may encounter issues with Graphviz, resulting in a failed documentation generation process. This error can occur due to various reasons, including incorrect configuration or outdated software versions.

One common issue is that Doxygen takes a long time to run on large codebases, which can lead to errors and warnings. For instance, if your codebase has over 1.5 million lines of code, it may take around 12 hours for Doxygen to process the data. This slow processing speed can cause Graphviz to fail.

Another common error is that the root directory in the release tarball is named differently than the expected name. For instance, if the root directory is named 'graphviz-9.0.0' instead of simply 'graphviz,' it may cause Doxygen to fail.

To resolve these issues, you can try upgrading your Doxygen version using the command 'doxygen -u.' Additionally, you can remove the problematic line from your configuration file to avoid warnings and errors.

If you are encountering issues with Graphviz specifically, ensure that the output directory for your generated images exists. You can create this directory manually if it does not exist already.

In some cases, Doxygen may also display warnings about outdated tags or obsolete configurations. These warnings can be safely ignored, but it's essential to keep your Doxygen version up-to-date to avoid any potential issues.

By following these troubleshooting steps and ensuring that your software versions are updated, you should be able to resolve common errors with Doxygen Graphviz failed and successfully generate documentation for your codebase.

Doxygen graphviz failed