When converting RDLC reports to ForNAV reports, you will notice that the Showoutput value on sections and controls sometimes has a function call to the NavHelperFunction, like in the following example from the RDLC Purchase Invoice: NavHelperFunction.IIFNOT(DynamicsNavDataSet.ShowInternalInfo==true && DynamicsNavDataSet.DimText_DimensionLoop1!=””,false,true) The NavHelperFunction has been put in place to emulate some of the built-in RDLC