pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3104-proto.ps) >>/Users/jc/w/tmp/Tune-3104-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1765/Thompson/proto.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_31047.log 261851 Log file, useful mostly for debugging
Coll_31049.log 536347 Log file, useful mostly for debugging
Form_31043.log 1958 Log file, useful mostly for debugging
Form_31049.log 1686 Log file, useful mostly for debugging
Tune-3104-get.log 4507 Log file, useful mostly for debugging
Tune-3104-proto.abc 535 ABC music file with the extracted tune(s)
Tune-3104-proto.ps 30938 PostScript
Tune-3104-proto.txt 535 Plain-text file with the extracted tune(s)
Tune-31041-get.log 56008 Log file, useful mostly for debugging
Tune-31045-get.log 16543 Log file, useful mostly for debugging
Tune-31046-get.log 3722 Log file, useful mostly for debugging
Tune-31049-get.log 5710 Log file, useful mostly for debugging
These files should be available for 24 hours.