Worked on the 4C-multiphysics/4C repository to enhance error handling and debugging for boundary condition entity types in C++. Focused on improving the clarity of error messages when users encountered invalid or undefined entity types, especially in scenarios where geometry was managed externally. Leveraged C++ development and debugging skills to modify legacy entity type handling, ensuring that users received actionable guidance to specify entity types correctly. Updated the read_conditions logic to provide more informative feedback when attempting to access non-existent entity types, streamlining the debugging process and reducing configuration errors. The work addressed one bug fix and emphasized robust error reporting practices.