Difference between RTW Info and CoderInfo?

AbcSignal = mpt.Signal; AbcSignal.DataType = 'uint8'; %Resolution: 0.0078125 AbcSignal.Description = 'Calculated xyz'; AbcSignal.Complexity = 'real'; AbcSignal.Dimensions = 1; AbcSignal.SamplingMode = 'Sample based'; AbcSignal.SampleTime = -1; AbcSignal.InitialValue = '0'; AbcSignal.Min = 0; AbcSignal.Max = 255; AbcSignal.DocUnits = 'Liters/Sec';

when I run the above mfile in R2012b/R2013, I found that

AbcSignal

AbcSignal =

mpt.Signal handle
Package: mpt

Properties:
       CoderInfo: [1x1 Simulink.CoderInfo]
     Description: 'Calculated xyz'
        DataType: 'uint8'
             Min: 0
             Max: 255
        DocUnits: 'Liters/Sec'
      Dimensions: 1
  DimensionsMode: 'auto'
      Complexity: 'real'
      SampleTime: -1
    SamplingMode: 'Sample based'
    InitialValue: '0'

Methods, Events, Superclasses

But when I load the same Mfile in earlier versions version(R2010b), I found the field name CoderInfo is missing, instead of that there is a field named RTWInfo.

Could any tell what is that and why is this difference. Because of this problem I couldn't able to run my simulink model(Compatible with R2010b) in latest versions(R2012/13)