pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6710-oneill_dmoi.ps) >>/Users/jc/w/tmp/Tune-6710-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_67104.log 66344 Log file, useful mostly for debugging
Coll_67105.log 67154 Log file, useful mostly for debugging
Form_67106.log 787 Log file, useful mostly for debugging
Form_67109.log 751 Log file, useful mostly for debugging
Tune-6710-get.log 4265 Log file, useful mostly for debugging
Tune-6710-oneill_dmoi.abc 339 ABC music file with the extracted tune(s)
Tune-6710-oneill_dmoi.ps 34335 PostScript
Tune-6710-oneill_dmoi.txt 339 Plain-text file with the extracted tune(s)
Tune-67100-get.log 8975 Log file, useful mostly for debugging
Tune-67101-get.log 4487 Log file, useful mostly for debugging
Tune-67102-get.log 9561 Log file, useful mostly for debugging
These files should be available for 24 hours.