pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22936-alas1.ps) >>/Users/jc/w/tmp/Tune-22936-get.log 2>&1" returned status 256
http://www.nigelgatherer.com/tunes/abc/abc4/alas1.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-22936-alas1.abc 335 ABC music file with the extracted tune(s)
Tune-22936-alas1.ps 36214 PostScript
Tune-22936-alas1.txt 335 Plain-text file with the extracted tune(s)
Tune-22936-get.log 4159 Log file, useful mostly for debugging
These files should be available for 24 hours.