pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28810-GftF2.ps) >>/Users/jc/w/tmp/Tune-28810-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnTreat/GftF/GftF2.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-28810-GftF2.abc 85423 ABC music file with the extracted tune(s)
Tune-28810-GftF2.ps 549516 PostScript
Tune-28810-GftF2.txt 85423 Plain-text file with the extracted tune(s)
Tune-28810-get.log 68606 Log file, useful mostly for debugging
These files should be available for 24 hours.