pgprof question

Profiling with pgprof (actually nvprof I think) and I can see the overall timings but not the subroutines and their dominate lines. For example the profiler notes that a particular subroutine, cgs, is the hot spot but it denotes it as cgs_ and can’t find it. I double click on cgs_ but nothing happens. If I select the “Select the code structure” button it notes that the filename “cgs_” in this case is an unknown filename.

I must have something setup wrong not allowing it to know where the subroutines are located. Can anyone help?