Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Tunes/Remick.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7499-Remick.ps) >>/Users/jc/w/tmp/Tune-7499-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Tunes/Remick.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_74998.log 992 Log file, useful mostly for debugging
Tune-7499-Remick.abc 144 ABC music file with the extracted tune(s)
Tune-7499-Remick.ps 6 PostScript
Tune-7499-Remick.txt 144 Plain-text file with the extracted tune(s)
Tune-7499-get.log 3986 Log file, useful mostly for debugging
Tune-74990-CharlesZeuner_TremontQuadrilles2.abc 169 ABC music file with the extracted tune(s)
Tune-74990-CharlesZeuner_TremontQuadrilles2.txt 169 Plain-text file with the extracted tune(s)
Tune-74990-get.log 9105 Log file, useful mostly for debugging
Tune-74993-get.log 4537 Log file, useful mostly for debugging
Tune-74994-get.log 4056 Log file, useful mostly for debugging
Tune-74996-get.log 4112 Log file, useful mostly for debugging
Tune-74998-get.log 4731 Log file, useful mostly for debugging
These files should be available for 24 hours.