debug scheme part working with Frescobaldi

[Eef Weenink]

So I am start working with scheme parts in my liypond files (using arranger.ly). Using Frescobalid to input all

When compiling I keep getting messages:

GUILE signaleerde een fout voor de hier beginnende expressie

It would be nice to know what error I made. I read I should

\include "guile-debugger.ly"

so I did, but then the compiling process keeps running untill I break it the hard way. 

How can I get a good result, the easy (best) way? 

regards, Eef