pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18942-5574.ps) >>/Users/jc/w/tmp/Tune-18942-get.log 2>&1" returned status 256
http://sessionite.com/docs/5574.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_18942.log 264789 Log file, useful mostly for debugging
Tune-18942-5574.abc 371 ABC music file with the extracted tune(s)
Tune-18942-5574.ps 36945 PostScript
Tune-18942-5574.txt 371 Plain-text file with the extracted tune(s)
Tune-18942-get.log 4107 Log file, useful mostly for debugging
These files should be available for 24 hours.