Worked on enhancing the reliability of PPTX export functionality in the microsoft/markitdown repository by addressing a critical bug related to unsupported chart types. Focused on back end development using Python, the solution introduced robust error handling and data processing techniques to ensure that the export process gracefully degrades when encountering unknown chart types. This approach prevented crashes and provided clear user feedback, improving the overall stability and predictability of the export workflow. The changes emphasized maintainability by refining error messaging and reducing the likelihood of user-reported failures, contributing to a more resilient and user-friendly document conversion experience.