pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-17099-091_Huntingtower.ps) >>/Users/jc/w/tmp/Tune-17099-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Chappell/091_Huntingtower.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_17099.log 249206 Log file, useful mostly for debugging
Form_17099.log 1671 Log file, useful mostly for debugging
Tune-17099-091_Huntingtower.abc 509 ABC music file with the extracted tune(s)
Tune-17099-091_Huntingtower.ps 34124 PostScript
Tune-17099-091_Huntingtower.txt 509 Plain-text file with the extracted tune(s)
Tune-17099-get.log 18939 Log file, useful mostly for debugging
These files should be available for 24 hours.