pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-86556-Aird_vol3_abc1.ps) >>/Users/jc/w/tmp/Tune-86556-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Aird/Aird_vol3_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
Tune-86556-Aird_vol3_abc1.abc 75597 ABC music file with the extracted tune(s)
Tune-86556-Aird_vol3_abc1.ps 1029919 PostScript
Tune-86556-Aird_vol3_abc1.txt 75597 Plain-text file with the extracted tune(s)
Tune-86556-get.log 121316 Log file, useful mostly for debugging
These files should be available for 24 hours.