pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-34213-oneill_dmoi.ps) >>/Users/jc/w/tmp/Tune-34213-get.log 2>&1" returned status 256
http://montrealsession.cechire.com/assets/abc/oneill_dmoi.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_34213.log 249279 Log file, useful mostly for debugging
Tune-34213-get.log 4276 Log file, useful mostly for debugging
Tune-34213-oneill_dmoi.abc 407 ABC music file with the extracted tune(s)
Tune-34213-oneill_dmoi.ps 38279 PostScript
Tune-34213-oneill_dmoi.txt 407 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.