Luis, I changed the Const macros to Macros for the Progress because of warnings: cc-3303 CC: WARNING File = /home/lorensen/Insight/Code/Common/itkProcessObject.h, Line = 158 A type qualifier on a return type is meaningless. itkGetConstMacro(Progress,float); ^ like the above. These are from the SGI compiler and we need to remove them. Any ideas? Bill