Hi,

We upgraded from 1.0.9 to 1.2.2 and after the upgrade we are getting exception where it's unable to load a grainwithguidkey with below error:- Error Details System.InvalidOperationException: Cannot find generated GrainReference class for interface 'Grains.Interfaces.User.IUserGrain' at Orleans.GrainFactory.MakeCaster(Type interfaceType) at System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory) at Orleans.GrainFactory.Cast(IAddressable grain, Type interfaceType) at Orleans.GrainFactory.Cast[TGrainInterface](IAddressable grain)

Would really appreciate any quick help on this.

Thanks, Somnath

Thanks @ReubenBond, adding reference to Microsoft.Orleans.CodeGenerator.MSBuild package worked for me.