pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7431-6504.ps) >>/Users/jc/w/tmp/Tune-7431-get.log 2>&1" returned status 256
http://thesession.org/tunes/6504

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_74319.log 136152 Log file, useful mostly for debugging
Tune-7431-6504.abc 201 ABC music file with the extracted tune(s)
Tune-7431-6504.ps 33708 PostScript
Tune-7431-6504.txt 201 Plain-text file with the extracted tune(s)
Tune-7431-get.log 3989 Log file, useful mostly for debugging
Tune-74313-get.log 3572 Log file, useful mostly for debugging
Tune-74314-CR40.abc 498 ABC music file with the extracted tune(s)
Tune-74314-CR40.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-74314-CR40.ps 36462 PostScript
Tune-74314-CR40.txt 498 Plain-text file with the extracted tune(s)
Tune-74314-get.log 5088 Log file, useful mostly for debugging
These files should be available for 24 hours.