pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-14742-3082-Sleep_on_till_day.ps) >>/Users/jc/w/tmp/Tune-14742-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/3082-Sleep_on_till_day.abc1.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_14742.log 1280476 Log file, useful mostly for debugging
Form_14742.log 869 Log file, useful mostly for debugging
Tune-14742-3082-Sleep_on_till_day.abc 1239 ABC music file with the extracted tune(s)
Tune-14742-3082-Sleep_on_till_day.ps 38561 PostScript
Tune-14742-3082-Sleep_on_till_day.txt 1239 Plain-text file with the extracted tune(s)
Tune-14742-get.log 125734 Log file, useful mostly for debugging
These files should be available for 24 hours.