pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5090-oneill_dmoi.ps) >>/Users/jc/w/tmp/Tune-5090-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_50901.log 275119 Log file, useful mostly for debugging
Coll_50905.log 63374 Log file, useful mostly for debugging
Coll_50908.log 64724 Log file, useful mostly for debugging
Form_50904.log 801 Log file, useful mostly for debugging
Form_50906.log 764 Log file, useful mostly for debugging
Form_50908.log 749 Log file, useful mostly for debugging
Tune-5090-get.log 4248 Log file, useful mostly for debugging
Tune-5090-oneill_dmoi.abc 362 ABC music file with the extracted tune(s)
Tune-5090-oneill_dmoi.ps 34776 PostScript
Tune-5090-oneill_dmoi.txt 362 Plain-text file with the extracted tune(s)
Tune-50901-get.log 6076 Log file, useful mostly for debugging
Tune-50902-get.log 4934 Log file, useful mostly for debugging
Tune-50906-get.log 4223 Log file, useful mostly for debugging
Tune-50908-MusiciansCompanionP1-1842-V2.abc 541 ABC music file with the extracted tune(s)
Tune-50908-MusiciansCompanionP1-1842-V2.txt 541 Plain-text file with the extracted tune(s)
Tune-50908-get.log 3448 Log file, useful mostly for debugging
These files should be available for 24 hours.