pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8619-1806.ps) >>/Users/jc/w/tmp/Tune-8619-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CaledonianMusicalRepository/1806/1806.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_86190.log 135547 Log file, useful mostly for debugging
Find_86193.log 1427 Log file, useful mostly for debugging
Form_86196.log 828 Log file, useful mostly for debugging
Tune-8619-1806.abc 2678 ABC music file with the extracted tune(s)
Tune-8619-1806.ps 41331 PostScript
Tune-8619-1806.txt 2678 Plain-text file with the extracted tune(s)
Tune-8619-get.log 8157 Log file, useful mostly for debugging
Tune-86190-get.log 3271 Log file, useful mostly for debugging
Tune-86196-get.log 4063 Log file, useful mostly for debugging
Tune-86199-get.log 2432 Log file, useful mostly for debugging
These files should be available for 24 hours.