Max, I changed ~/op25/op25/gr-op25_repeater/lib/imbe_vocoder/pitch_est.cc per your direction but was still unable to compile. Bill From: op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Monday, August 21, 2017 9:14 AM To: op25-dev@yahoogroups.com Subject: [op25-dev] Re: Raspbian Jessie Stretch Lite It sounds like the C compiler in this case is having added picky-ness. Could I have you try changing the following code in pitch_est.cc, at line 37 from static const Word16 min_max_tbl[203] = to static const UWord16 min_max_tbl[203] = If that works OK I'll put the patch in the queue. Currently I've got a few patches from Graham and others that I've been needing to get pushed as well which have been languishing ... Max