pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-29529-archive-alpha.ps) >>/Users/jc/w/tmp/Tune-29529-get.log 2>&1" returned status 256
http://wellingtonsession.org/abc-collections/archive-alpha.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-29529-archive-alpha.abc 201 ABC music file with the extracted tune(s)
Tune-29529-archive-alpha.ps 34497 PostScript
Tune-29529-archive-alpha.txt 201 Plain-text file with the extracted tune(s)
Tune-29529-get.log 8775 Log file, useful mostly for debugging
These files should be available for 24 hours.