pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99264-32.ps) >>/Users/jc/w/tmp/Tune-99264-get.log 2>&1" returned status 256
http://thesession.org/tunes/32

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-99264-32.abc 292 ABC music file with the extracted tune(s)
Tune-99264-32.ps 36764 PostScript
Tune-99264-32.txt 292 Plain-text file with the extracted tune(s)
Tune-99264-get.log 3955 Log file, useful mostly for debugging
These files should be available for 24 hours.