Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/mixed/cont.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5233-cont.ps) >>/Users/jc/w/tmp/Tune-5233-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/mixed/cont.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-5233-cont.abc 142 ABC music file with the extracted tune(s)
Tune-5233-cont.ps 6 PostScript
Tune-5233-cont.txt 142 Plain-text file with the extracted tune(s)
Tune-5233-get.log 3948 Log file, useful mostly for debugging
Tune-52330-Goulding_SSEIFA_v3.abc 155 ABC music file with the extracted tune(s)
Tune-52330-Goulding_SSEIFA_v3.pdf 2217 Portable Data Format
Tune-52330-Goulding_SSEIFA_v3.ps 6 PostScript
Tune-52330-Goulding_SSEIFA_v3.txt 155 Plain-text file with the extracted tune(s)
Tune-52330-get.log 5110 Log file, useful mostly for debugging
Tune-52339-get.log 7354 Log file, useful mostly for debugging
These files should be available for 24 hours.