pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3974-Salmon_tails_up_the_water_2.ps) >>/Users/jc/w/tmp/Tune-3974-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/kirby98.fsnet.co.uk/sa/Salmon_tails_up_the_water_2.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
Tune-3974-Salmon_tails_up_the_water_2.abc 388 ABC music file with the extracted tune(s)
Tune-3974-Salmon_tails_up_the_water_2.ps 34510 PostScript
Tune-3974-Salmon_tails_up_the_water_2.txt 388 Plain-text file with the extracted tune(s)
Tune-3974-get.log 5353 Log file, useful mostly for debugging
Tune-39747-get.log 2860 Log file, useful mostly for debugging
These files should be available for 24 hours.