Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1780/Straight_Skillern.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7294-Straight_Skillern.ps) >>/Users/jc/w/tmp/Tune-7294-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1780/Straight_Skillern.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_72947.log 1025 Log file, useful mostly for debugging
Tune-7294-Straight_Skillern.abc 154 ABC music file with the extracted tune(s)
Tune-7294-Straight_Skillern.ps 6 PostScript
Tune-7294-Straight_Skillern.txt 154 Plain-text file with the extracted tune(s)
Tune-7294-get.log 8647 Log file, useful mostly for debugging
Tune-72940-get.log 4009 Log file, useful mostly for debugging
Tune-72940-slurs.abc 142 ABC music file with the extracted tune(s)
Tune-72940-slurs.ps 6 PostScript
Tune-72940-slurs.txt 142 Plain-text file with the extracted tune(s)
Tune-72943-get.log 4594 Log file, useful mostly for debugging
Tune-72945-get.log 1394 Log file, useful mostly for debugging
Tune-72946-get.log 5671 Log file, useful mostly for debugging
These files should be available for 24 hours.