Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book27/ERM-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5665-ERM-V2.ps) >>/Users/jc/w/tmp/Tune-5665-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book27/ERM-V2.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-5665-ERM-V2.abc 145 ABC music file with the extracted tune(s)
Tune-5665-ERM-V2.ps 6 PostScript
Tune-5665-ERM-V2.txt 145 Plain-text file with the extracted tune(s)
Tune-5665-get.log 11713 Log file, useful mostly for debugging
Tune-56651-get.log 3546 Log file, useful mostly for debugging
Tune-56652-get.log 4012 Log file, useful mostly for debugging
Tune-56653-AbrahamMackintosh.abc 156 ABC music file with the extracted tune(s)
Tune-56653-AbrahamMackintosh.ps 6 PostScript
Tune-56653-AbrahamMackintosh.txt 156 Plain-text file with the extracted tune(s)
Tune-56653-get.log 4150 Log file, useful mostly for debugging
These files should be available for 24 hours.