pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-63201-0000-Title.ps) >>/Users/jc/w/tmp/Tune-63201-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Crystal/0000-Title.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
Coll_63201.log 144622 Log file, useful mostly for debugging
Tune-63201-0000-Title.abc 194 ABC music file with the extracted tune(s)
Tune-63201-0000-Title.ps 30977 PostScript
Tune-63201-0000-Title.txt 194 Plain-text file with the extracted tune(s)
Tune-63201-get.log 8274 Log file, useful mostly for debugging
These files should be available for 24 hours.