Worked on enhancing the robustness and compatibility of the CGNS reader within the hlrs-vis/covise repository, focusing on stability when handling newer CGNS formats. Addressed a critical bug by updating the reader to use cg_poly_elements_read for MIXED and NGON element types, ensuring correct element connectivity through ElementStartOffset. Improved crash resilience for structural grids by validating zone sizes and disallowing unsupported structured grid types, preventing runtime failures. Refactored code for better readability and maintainability, incorporating clang-tidy cleanups. The work leveraged C++, the CGNS library, and data structure management to deliver a more reliable and future-proof file ingestion process.