pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-53828-202_ColRidleysQuickMarch.ps) >>/Users/jc/w/tmp/Tune-53828-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/AbrahamMackintosh/202_ColRidleysQuickMarch.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-53828-202_ColRidleysQuickMarch.abc 922 ABC music file with the extracted tune(s)
Tune-53828-202_ColRidleysQuickMarch.ps 37243 PostScript
Tune-53828-202_ColRidleysQuickMarch.txt 922 Plain-text file with the extracted tune(s)
Tune-53828-get.log 4841 Log file, useful mostly for debugging
These files should be available for 24 hours.