pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3880-Graded1.ps) >>/Users/jc/w/tmp/Tune-3880-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Graded1.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_38803.log 253509 Log file, useful mostly for debugging
Tune-3880-Graded1.abc 419 ABC music file with the extracted tune(s)
Tune-3880-Graded1.ps 35374 PostScript
Tune-3880-Graded1.txt 419 Plain-text file with the extracted tune(s)
Tune-3880-get.log 7736 Log file, useful mostly for debugging
Tune-38800-get.log 32979 Log file, useful mostly for debugging
Tune-38802-get.log 1400 Log file, useful mostly for debugging
Tune-38804-get.log 4847 Log file, useful mostly for debugging
These files should be available for 24 hours.