I am trying to write an iif equation that doesn't involve a numerical value, but simply whether a feature is suppressed or unsuppressed.  I am using SW 2011 on an assembly with several subassemblies to have parts automatically update from one driving dimension change.  I have created the following equation: "WATERFALL"= iif ("D1@Sketch1@RIGHT PLANT ON -- PLANT ON BACK.Part" - 2,  "unsuppressed"  ,  "suppressed" ) but this does not change the assembly.  What am I missing?  Thanks.