pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-96611-07-CraigtonJig-JC.ps) >>/Users/jc/w/tmp/Tune-96611-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Graded2/07-CraigtonJig-JC.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
Form_96611.log 952 Log file, useful mostly for debugging
Tune-96611-07-CraigtonJig-JC.abc 826 ABC music file with the extracted tune(s)
Tune-96611-07-CraigtonJig-JC.ps 38051 PostScript
Tune-96611-07-CraigtonJig-JC.txt 826 Plain-text file with the extracted tune(s)
Tune-96611-get.log 4896 Log file, useful mostly for debugging
These files should be available for 24 hours.