Trying to isolate the problem, i've just opened a New Scene (RESET MAX) and created a Corona light, a new state set, and recorded. Changed the light intensity and got an error :
===================================================
1 states have encountered errors and have been disabled to allow you to continue working. Please report this to Autodesk by sending us the following text:
State type: Autodesk.Max.StateSets.Entities.StateSets.Nodes.LightParameter
Error: System.Runtime.InteropServices.SEHException (0x80004005): External component has thrown an exception.
at Autodesk.Max.Wrappers.LightObject.SetIntensity(Int32 time, Single f)
at Autodesk.Max.StateSets.Entities.StateSets.Nodes.LightParameter.SetParameterValue(Properties property, Object value, SetParameterReason reason)
at Autodesk.Max.StateSets.Entities.StateSets.Parameter`1.Revert()
at Autodesk.Max.StateSets.Entities.StateSets.State.Revert(Entity parent)
===================================================
I know State sets is a Bag of Bugs, but doing the same using an ordinary Omni light it worked ok, no errors. Using corona light State Sets are not recording changes on Light intensity Rollout and it's reporting those errors...
Just to remember, i am using ALPHA 5. Not a daily build.