pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-60981-000_hdr24CD_1805.ps) >>/Users/jc/w/tmp/Tune-60981-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1803/Preston/000_hdr24CD_1805.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-60981-000_hdr24CD_1805.abc 1317 ABC music file with the extracted tune(s)
Tune-60981-000_hdr24CD_1805.ps 32517 PostScript
Tune-60981-000_hdr24CD_1805.txt 1317 Plain-text file with the extracted tune(s)
Tune-60981-get.log 4681 Log file, useful mostly for debugging
These files should be available for 24 hours.