Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/ScotsMusicalMuseumV4/MMM2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6214-MMM2.ps) >>/Users/jc/w/tmp/Tune-6214-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ScotsMusicalMuseumV4/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_62140.log 351774 Log file, useful mostly for debugging
Tune-6214-MMM2.abc 157 ABC music file with the extracted tune(s)
Tune-6214-MMM2.ps 6 PostScript
Tune-6214-MMM2.txt 157 Plain-text file with the extracted tune(s)
Tune-6214-get.log 4036 Log file, useful mostly for debugging
Tune-62141-24CountryDances_1782_Thompson.abc 164 ABC music file with the extracted tune(s)
Tune-62141-24CountryDances_1782_Thompson.ps 6 PostScript
Tune-62141-24CountryDances_1782_Thompson.txt 164 Plain-text file with the extracted tune(s)
Tune-62141-get.log 7582 Log file, useful mostly for debugging
Tune-62142-get.log 22285 Log file, useful mostly for debugging
Tune-62143-get.log 4009 Log file, useful mostly for debugging
Tune-62144-get.log 86419 Log file, useful mostly for debugging
Tune-62147-Cockle_Shells-001.svg 14349 Scalable Vector Graphics format
Tune-62147-Cockle_Shells.abc 1221 ABC music file with the extracted tune(s)
Tune-62147-Cockle_Shells.txt 1221 Plain-text file with the extracted tune(s)
Tune-62147-get.log 4118 Log file, useful mostly for debugging
These files should be available for 24 hours.