pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-77168-current-by-type.ps) >>/Users/jc/w/tmp/Tune-77168-get.log 2>&1" returned status 256
http://wellington.session.nz/tunebooks/current-by-type.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
Coll_77168.log 261969 Log file, useful mostly for debugging
Tune-77168-current-by-type.abc 328 ABC music file with the extracted tune(s)
Tune-77168-current-by-type.ps 35779 PostScript
Tune-77168-current-by-type.txt 328 Plain-text file with the extracted tune(s)
Tune-77168-get.log 6812 Log file, useful mostly for debugging
These files should be available for 24 hours.