Group detection in the process method
I've been following the tutorials and adapting them bit by bit to suit my own fin whale dataset, and I've come across an error message when I try to group individual detections. To put this into context this coincides with line 27 in section 7 of this tutorial: https://docs.meridian.cs.dal.ca/ketos/tutorials/create_a_narw_detector/tutorial.html
The error message I get is: 
Looking at 'detections_grp' so far:
I was wondering if it is due to the fact that the last line in 'Raw_Wav_20180102_002342.wav' has an offset of 588.0 seconds and a duration of 6 seconds. Each audio file in my dataset is 600 seconds long, which would result in a 'det_end' lower than a 'det_start'.
If this is a case, is there a workaround? Or have I misunderstood something?
Many thanks,
Shaula