Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/jpg/cresc.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4168-cresc.ps) >>/Users/jc/w/tmp/Tune-4168-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/jpg/cresc.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_41680.log 852 Log file, useful mostly for debugging
Tune-4168-cresc.abc 141 ABC music file with the extracted tune(s)
Tune-4168-cresc.ps 6 PostScript
Tune-4168-cresc.txt 141 Plain-text file with the extracted tune(s)
Tune-4168-get.log 7820 Log file, useful mostly for debugging
Tune-41680-get.log 5755 Log file, useful mostly for debugging
Tune-41681-077_Lillibulero.abc 826 ABC music file with the extracted tune(s)
Tune-41681-077_Lillibulero.pdf 20875 Portable Data Format
Tune-41681-077_Lillibulero.ps 36502 PostScript
Tune-41681-077_Lillibulero.txt 826 Plain-text file with the extracted tune(s)
Tune-41681-get.log 5431 Log file, useful mostly for debugging
Tune-41685-get.log 4624 Log file, useful mostly for debugging
Tune-41686-get.log 2593 Log file, useful mostly for debugging
Tune-41688-get.log 4112 Log file, useful mostly for debugging
Tune-41689-get.log 3888 Log file, useful mostly for debugging
These files should be available for 24 hours.