pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-29839-proto.ps) >>/Users/jc/w/tmp/Tune-29839-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1782/Thompson/proto.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-29839-031_Dermot.abc 766 ABC music file with the extracted tune(s)
Tune-29839-031_Dermot.pdf 16962 Portable Data Format
Tune-29839-031_Dermot.ps 35722 PostScript
Tune-29839-031_Dermot.txt 766 Plain-text file with the extracted tune(s)
Tune-29839-get.log 9854 Log file, useful mostly for debugging
Tune-29839-proto.abc 534 ABC music file with the extracted tune(s)
Tune-29839-proto.ps 30939 PostScript
Tune-29839-proto.txt 534 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.