pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-34218-Silver_Spear_1.ps) >>/Users/jc/w/tmp/Tune-34218-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/corneymusers/Silver_Spear_1.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Form_34218.log 915 Log file, useful mostly for debugging
Tune-34218-Silver_Spear_1.abc 579 ABC music file with the extracted tune(s)
Tune-34218-Silver_Spear_1.ps 38490 PostScript
Tune-34218-Silver_Spear_1.txt 579 Plain-text file with the extracted tune(s)
Tune-34218-get.log 4948 Log file, useful mostly for debugging
These files should be available for 24 hours.