pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-48613-2321_the_Sows_tail_etc.ps) >>/Users/jc/w/tmp/Tune-48613-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/2321_the_Sows_tail_etc.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-48613-2321_the_Sows_tail_etc.abc 3892 ABC music file with the extracted tune(s)
Tune-48613-2321_the_Sows_tail_etc.ps 80316 PostScript
Tune-48613-2321_the_Sows_tail_etc.txt 3892 Plain-text file with the extracted tune(s)
Tune-48613-get.log 4685 Log file, useful mostly for debugging
These files should be available for 24 hours.