Minim not understanding m3u files

[windbag]

Thanks for the prompt response.
The only messages on the phone are as detailed in my OP.
The log file errors are somewhat depressing, as there are thousands of them.
So I copied the log locally to this PC and extracted just the relevant entries to the first playlist I tried & failed with.
For "Strawbs" entries - there are 112 of them, all warnings of one of 3 types:
Warning: ignored conflicting DISCNUMBER value 1 in file _MainArtists/S/Sti-Sty/Strawbs/Music Files/Main Band Live/1974-04-11_BBC Golders Green Hippodrome/Heroes are forever (Disc 2)/09_Lay a little light on me.mp3

Warning: ID3v2 APIC frame has invalid MIME type 'image/' at offset 355 in file _MainArtists/S/Sti-Sty/Strawbs/Music Files/Main Band Live/1978-02-18_Golders Green Hippdrome (BBC R1 Sight & Sound)/01_Lay Down.mp3 (length 9478142)

Warning: ignoring additional ID3v2 tag at offset 35262 in file _MainArtists/S/Sti-Sty/Strawbs/Music Files/Main Band Live/1978-02-18_Golders Green Hippdrome (BBC R1 Sight & Sound)/01_Lay Down.mp3 (length 9478142)

But none of them cited the tracks in the (short) playlist I tried:
A short (3-track) example of my m3u files would be (the bit between the "===" lines:
===
#EXTM3U
#EXTINF:-1,05_Mother Luck
..\..\Music Files\_Solo & With Friends\1_Dave Cousins (& Friends)\08_The Boy In The Sailor Suit(2007)\05_Mother Luck.mp3
#EXTINF:-1,07_Skip To My Lou
..\..\Music Files\_Solo & With Friends\1_Dave Cousins (& Friends)\08_The Boy In The Sailor Suit(2007)\07_Skip To My Lou.mp3
#EXTINF:-1,08_Lonely Days, Lonely Nights
..\..\Music Files\_Solo & With Friends\1_Dave Cousins (& Friends)\08_The Boy In The Sailor Suit(2007)\08_Lonely Days, Lonely Nights.mp3
===

I tried searching for "Solo", "Sailor", "Cousins", "Skip", "Lonely" (ignoring case) and none were found in the log.