I'm trying to use the u_samplekit2 abstraction from rjlib, and having trouble getting it to work.

The help file says that the directory containing the samples must also contain a text file named "index.txt" that maps filenames to numbers. But it does not say how exactly one is supposed to enter that information in the text file. I tried writing a couple of lines to test it ("g1" and "g2" are sample filenames):