it seems to produce this Error message
Some mods failed to load. Update or remove the affected mods and try again.
System.MissingMethodException: Method not found: Mafi.Duration Mafi.Core.Factory.Recipes.RecipeProto.get_Duration()
at ProductionCalculator.Core.Services.ProductionCalculatorService..ctor (Mafi.Core.Prototypes.ProtosDb protosDb) [0x00019]
at (wrapper managed-to-native) System.Reflection.RuntimeConstructorInfo.InternalInvoke(System.Reflection.RuntimeConstructorInfo,object,object[],System.Exception&)
at System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005]
Game version: 0.8.6a
Loaded mods: (Trains expansion 1.0.0), (Supporter edition 1.1.0), (Kayser's Automatic Terrain Designations 0.5.2), (Show Terrain Grid 1.0.2), (Production Calculator 0.1.0), (Keybind Framework 1.0.1), (Tweaks++ 1.2.0)
Failed mods: none