pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2836-AmericanSD.ps) >>/Users/jc/w/tmp/Tune-2836-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ViolaRuth/AmericanSD.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_28361.log 246396 Log file, useful mostly for debugging
Coll_28367.log 465578 Log file, useful mostly for debugging
Find_28369.log 1479 Log file, useful mostly for debugging
Form_28360.log 858 Log file, useful mostly for debugging
Form_28362.log 813 Log file, useful mostly for debugging
Form_28365.log 1959 Log file, useful mostly for debugging
Form_28367.log 840 Log file, useful mostly for debugging
Form_28368.log 1656 Log file, useful mostly for debugging
Tune-2836-AmericanSD.abc 8423 ABC music file with the extracted tune(s)
Tune-2836-AmericanSD.ps 112190 PostScript
Tune-2836-AmericanSD.txt 8423 Plain-text file with the extracted tune(s)
Tune-2836-get.log 11463 Log file, useful mostly for debugging
Tune-28363-get.log 1319 Log file, useful mostly for debugging
Tune-28366-get.log 171274 Log file, useful mostly for debugging
Tune-28369-get.log 174167 Log file, useful mostly for debugging
These files should be available for 24 hours.