pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-70140-seansSetBook1704.ps) >>/Users/jc/w/tmp/Tune-70140-get.log 2>&1" returned status 256
http://wellington.session.nz/tunebooks/other/seansSetBook1704.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-70140-get.log 4733 Log file, useful mostly for debugging
Tune-70140-seansSetBook1704.abc 437 ABC music file with the extracted tune(s)
Tune-70140-seansSetBook1704.ps 35931 PostScript
Tune-70140-seansSetBook1704.txt 437 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.