pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-60388-120visitor.ps) >>/Users/jc/w/tmp/Tune-60388-get.log 2>&1" returned status 256
http://www.yorkshirefolksong.net/songfiles/abc/120visitor.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-60388-120visitor.abc 342 ABC music file with the extracted tune(s)
Tune-60388-120visitor.ps 35352 PostScript
Tune-60388-120visitor.txt 342 Plain-text file with the extracted tune(s)
Tune-60388-get.log 4249 Log file, useful mostly for debugging
These files should be available for 24 hours.