pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-82953-1777_Straight_Skillern_Minuets-V1.ps) >>/Users/jc/w/tmp/Tune-82953-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1777_Straight_Skillern_Minuets-V1.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-82953-1777_Straight_Skillern_Minuets-V1.abc 15513 ABC music file with the extracted tune(s)
Tune-82953-1777_Straight_Skillern_Minuets-V1.ps 110029 PostScript
Tune-82953-1777_Straight_Skillern_Minuets-V1.txt 15513 Plain-text file with the extracted tune(s)
Tune-82953-get.log 12403 Log file, useful mostly for debugging
These files should be available for 24 hours.