pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4421-HUTB1-1844-V1.ps) >>/Users/jc/w/tmp/Tune-4421-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Hamilton/HUTB1-1844-V1.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_44215.log 253509 Log file, useful mostly for debugging
Coll_44216.log 139177 Log file, useful mostly for debugging
Form_4421.log 859 Log file, useful mostly for debugging
Tune-4421-HUTB1-1844-V1.abc 743 ABC music file with the extracted tune(s)
Tune-4421-HUTB1-1844-V1.ps 37192 PostScript
Tune-4421-HUTB1-1844-V1.txt 743 Plain-text file with the extracted tune(s)
Tune-4421-get.log 4452 Log file, useful mostly for debugging
Tune-44210-get.log 3023 Log file, useful mostly for debugging
Tune-44213-get.log 3144 Log file, useful mostly for debugging
Tune-44214-get.log 3458 Log file, useful mostly for debugging
Tune-44216-get.log 5381 Log file, useful mostly for debugging
Tune-44218-get.log 3492 Log file, useful mostly for debugging
These files should be available for 24 hours.