pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-60315-033_My_Boy_Tammy.ps) >>/Users/jc/w/tmp/Tune-60315-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Chappell/033_My_Boy_Tammy.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_60315.log 454208 Log file, useful mostly for debugging
Form_60315.log 1033 Log file, useful mostly for debugging
Tune-60315-033_My_Boy_Tammy.abc 488 ABC music file with the extracted tune(s)
Tune-60315-033_My_Boy_Tammy.ps 35620 PostScript
Tune-60315-033_My_Boy_Tammy.txt 488 Plain-text file with the extracted tune(s)
Tune-60315-get.log 4530 Log file, useful mostly for debugging
These files should be available for 24 hours.