What is your FM version: FM Version 21.4.0 - 1540115 (m.e v21.7.0.0) What is your FMRTE version: FMRTE 21.4.0 (Build 36)   Are you running FMRTE as administrator- YES   Someone posted about stadiums in the past and not retaining the edited capacity. The workaround was found to be a new savegame file was needed. I have tried this but after 3 weeks - 1 month, the capacity reverts back to the original. I have edited both the 3D stadium and information to match