BaR1BoD

I have created an EntityData that I want to save when the world closes and load that save when the world opens. private static final EntityDataAccessor<Float> ENGINE_POWER = SynchedEntityData.defineId(AircraftVehicle.class, EntityDataSerializers.FLOAT); @Override protected void defineSynchedData(SynchedEntityData.Builder builder) { super.defineSynchedData(builder); builder.define(ENGINE_POWER, 0f); } @Override protected void addAdditionalSaveData(CompoundTag compoundTag) { super.addAdditionalSaveData(compoundTag); compoundTag.putFloat("EnginePower", entityData.get(ENGINE_POWER)); } @Override protected void readAdditionalSaveData(CompoundTag compoundTag) { super.readAdditionalSaveData(compoundTag); if (compoundTag.contains("EnginePower")) { entityData.set(ENGINE_POWER, compoundTag.getFloat("EnginePower")); } } The problem is that entityData.get(ENGINE_POWER) in addAdditionalSaveData method always return the default value