pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-64142-92.ps) >>/Users/jc/w/tmp/Tune-64142-get.log 2>&1" returned status 256
http://thesession.org/tunes/92

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-64142-92.abc 193 ABC music file with the extracted tune(s)
Tune-64142-92.ps 34756 PostScript
Tune-64142-92.txt 193 Plain-text file with the extracted tune(s)
Tune-64142-get.log 3984 Log file, useful mostly for debugging
These files should be available for 24 hours.