Worked on the SWMFsoftware/SWMF repository to implement version-specific handling for HEIDI within the multifluid IM-GM coupling, focusing on improving simulation correctness when HEIDI is active. Updated the CON_couple_gm_im.f90 module in Fortran to conditionally set NameVar and nVarImGm based on NameVersionIm, ensuring the appropriate variables are used for each version. This approach addressed potential mismatches in variable sets across different versions and established a foundation for consistent multi-version support. Leveraged skills in numerical simulation and scientific computing to enhance runtime stability for HEIDI-enabled runs, contributing a targeted feature that improves the reliability of multifluid coupling workflows.