pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5676-4231_Captain_OKain.ps) >>/Users/jc/w/tmp/Tune-5676-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CSR/4231_Captain_OKain.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_56761.log 403294 Log file, useful mostly for debugging
Coll_56764.log 497893 Log file, useful mostly for debugging
Tune-5676-4231_Captain_OKain.abc 918 ABC music file with the extracted tune(s)
Tune-5676-4231_Captain_OKain.ps 39808 PostScript
Tune-5676-4231_Captain_OKain.txt 918 Plain-text file with the extracted tune(s)
Tune-5676-get.log 4560 Log file, useful mostly for debugging
Tune-56762-get.log 5998 Log file, useful mostly for debugging
Tune-56763-AbrahamMackintosh.abc 165 ABC music file with the extracted tune(s)
Tune-56763-AbrahamMackintosh.ps 6 PostScript
Tune-56763-AbrahamMackintosh.txt 165 Plain-text file with the extracted tune(s)
Tune-56763-get.log 4200 Log file, useful mostly for debugging
Tune-56765-get.log 13407 Log file, useful mostly for debugging
These files should be available for 24 hours.