pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9590-John_Peel_Variations_1.ps) >>/Users/jc/w/tmp/Tune-9590-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/kirby98.fsnet.co.uk/jo/John_Peel_Variations_1.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_95902.log 1037299 Log file, useful mostly for debugging
Coll_95906.log 137362 Log file, useful mostly for debugging
Form_95905.log 859 Log file, useful mostly for debugging
Tune-9590-John_Peel_Variations_1.abc 547 ABC music file with the extracted tune(s)
Tune-9590-John_Peel_Variations_1.ps 41106 PostScript
Tune-9590-John_Peel_Variations_1.txt 547 Plain-text file with the extracted tune(s)
Tune-9590-get.log 4817 Log file, useful mostly for debugging
These files should be available for 24 hours.