Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/GftF/MMM2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7933-MMM2.ps) >>/Users/jc/w/tmp/Tune-7933-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/GftF/MMM2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-7933-MMM2.abc 141 ABC music file with the extracted tune(s)
Tune-7933-MMM2.ps 6 PostScript
Tune-7933-MMM2.txt 141 Plain-text file with the extracted tune(s)
Tune-7933-get.log 3938 Log file, useful mostly for debugging
Tune-79330-get.log 5969 Log file, useful mostly for debugging
Tune-79331-get.log 4342 Log file, useful mostly for debugging
Tune-79332-get.log 3350 Log file, useful mostly for debugging
Tune-79333-751_Robinson_Cruso.abc 1226 ABC music file with the extracted tune(s)
Tune-79333-751_Robinson_Cruso.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-79333-751_Robinson_Cruso.ps 36540 PostScript
Tune-79333-751_Robinson_Cruso.txt 1226 Plain-text file with the extracted tune(s)
Tune-79333-get.log 5464 Log file, useful mostly for debugging
Tune-79334-get.log 5743 Log file, useful mostly for debugging
Tune-79335-get.log 11990 Log file, useful mostly for debugging
Tune-79336-get.log 12281 Log file, useful mostly for debugging
Tune-79337-get.log 19712 Log file, useful mostly for debugging
Tune-79338-Wilson_Harmony_4NCD_1812_V2.abc 165 ABC music file with the extracted tune(s)
Tune-79338-Wilson_Harmony_4NCD_1812_V2.ps 6 PostScript
Tune-79338-Wilson_Harmony_4NCD_1812_V2.txt 165 Plain-text file with the extracted tune(s)
Tune-79338-get.log 7587 Log file, useful mostly for debugging
These files should be available for 24 hours.