Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/12081_Eske_Side.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41944-all.ps) >>/Users/jc/w/tmp/Tune-41944-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/12081_Eske_Side.abc/all

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_41944.log 2678061 Log file, useful mostly for debugging
Tune-41944-139_Round_Good-night-001.svg 9373 Scalable Vector Graphics format
Tune-41944-139_Round_Good-night.abc 712 ABC music file with the extracted tune(s)
Tune-41944-139_Round_Good-night.txt 712 Plain-text file with the extracted tune(s)
Tune-41944-all.abc 167 ABC music file with the extracted tune(s)
Tune-41944-all.ps 6 PostScript
Tune-41944-all.txt 167 Plain-text file with the extracted tune(s)
Tune-41944-get.log 8380 Log file, useful mostly for debugging
These files should be available for 24 hours.