Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/mp3/MMM2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4656-MMM2.ps) >>/Users/jc/w/tmp/Tune-4656-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/mp3/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
Coll_46567.log 263809 Log file, useful mostly for debugging
Find_46568.log 1739 Log file, useful mostly for debugging
Tune-4656-MMM2.abc 140 ABC music file with the extracted tune(s)
Tune-4656-MMM2.ps 6 PostScript
Tune-4656-MMM2.txt 140 Plain-text file with the extracted tune(s)
Tune-4656-get.log 3932 Log file, useful mostly for debugging
Tune-46566-IgnatiusSancho_CNS_v2.abc 160 ABC music file with the extracted tune(s)
Tune-46566-IgnatiusSancho_CNS_v2.pdf 2217 Portable Data Format
Tune-46566-IgnatiusSancho_CNS_v2.ps 6 PostScript
Tune-46566-IgnatiusSancho_CNS_v2.txt 160 Plain-text file with the extracted tune(s)
Tune-46566-get.log 37406 Log file, useful mostly for debugging
These files should be available for 24 hours.