I have a Colorfly ck4 DAP (made in 2011) that has issues playing certain APE files (these play fine in Foobar and other devices). Not sure what's going on ... might be some sensitivity in the CUE sheet. Have a look ...
Plays fine:
REM DISCID 3C12DA04
REM COMMENT "ExactAudioCopy v0.99pb5"
CATALOG 0000000000000
PERFORMER "Suitner"
TITLE "Bruchner-Symphony No.8"
FILE "Bruckner - Symphony No. 8.ape" WAVE
TRACK 01 AUDIO
TITLE "I.Allegro moderato"
PERFORMER "Suitner"
FLAGS DCP
INDEX 01 00:00:00
TRACK 02 AUDIO
TITLE "II.Scherzo.Allegro moderato"
PERFORMER "Suitner"
FLAGS DCP
INDEX 01 15:36:10
TRACK 03 AUDIO
TITLE "III.Adagio.Feierich langsam,doch nicht schleppend"
PERFORMER "Suitner"
FLAGS DCP
INDEX 01 30:26:05
TRACK 04 AUDIO
TITLE "IV.Finale.Feierich,nicht schnell"
PERFORMER "Suitner"
INDEX 00 57:21:60
INDEX 01 57:26:23
"File ERROR!!" fault (does not play):
REM DATE 1996
REM DISCID 9C0AC50C
REM COMMENT "ExactAudioCopy v0.99pb4"
PERFORMER "Lush"
TITLE "Lovelife"
FILE "CDImage.ape" WAVE
TRACK 01 AUDIO
TITLE "Ladykillers"
PERFORMER "Lush"
INDEX 01 00:00:00
TRACK 02 AUDIO
TITLE "Heavenly Nobodies"
PERFORMER "Lush"
INDEX 01 03:14:12
TRACK 03 AUDIO
TITLE "500"
PERFORMER "Lush"
INDEX 00 06:11:72
INDEX 01 06:13:17
TRACK 04 AUDIO
TITLE "I've Been Here Before"
PERFORMER "Lush"
INDEX 00 09:41:65
INDEX 01 09:43:02
TRACK 05 AUDIO
TITLE "Papasan"
PERFORMER "Lush"
INDEX 00 14:17:10
INDEX 01 14:19:30
TRACK 06 AUDIO
TITLE "Single Girl"
PERFORMER "Lush"
INDEX 01 16:55:27
TRACK 07 AUDIO
TITLE "Ciao!"
PERFORMER "Lush"
INDEX 00 19:29:27
INDEX 01 19:30:37
TRACK 08 AUDIO
TITLE "Tralala"
PERFORMER "Lush"
INDEX 00 22:59:40
INDEX 01 23:01:10
TRACK 09 AUDIO
TITLE "Last Night"
PERFORMER "Lush"
INDEX 00 28:33:00
INDEX 01 28:35:52
TRACK 10 AUDIO
TITLE "Runaway"
PERFORMER "Lush"
INDEX 01 33:59:20
TRACK 11 AUDIO
TITLE "The Childcatcher"
PERFORMER "Lush"
INDEX 00 37:34:10
INDEX 01 37:35:57
TRACK 12 AUDIO
TITLE "Olympia"
PERFORMER "Lush"
INDEX 00 40:49:60
INDEX 01 40:53:15
Refs:
https://penonaudio.com/colorfly-ck4plus.html