where is the full stack trace assigned to its id

Hi, GHC version: win32 6.6.1 App was compiled with ghc -make -prof -auto-all <files> ... and run with app.exe <appSpecificOptions> +RTS -hc The result is that app.exe.hp contains the sample items in the format like (651)/createAndRunWindows/... 180 The question is where can I find the full stack trace corresponding to 651 identification number? I expected it to be in app.exe.prof (as it is with -hr option), but that file is empty. Do I miss some other RTS option? Peter.