symtrace = SymbolicTrace[sys,{λ>0,lg>0,lp>0}, SeriesOrder->6, MakeFloatingPoint->All, ReportedParameters->{SymbolicOpticalLength}, IncludeUserTerms->{λ}, LocalCoordinateExpansions->None, RunningCommentary->True];
Created by Mathematica (July 29, 2005)