pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-89474-Brown_Joak.ps) >>/Users/jc/w/tmp/Tune-89474-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JohnWalsh/Brown_Joak.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_89474.log 1010 Log file, useful mostly for debugging
Tune-89474-Brown_Joak.abc 459 ABC music file with the extracted tune(s)
Tune-89474-Brown_Joak.ps 33216 PostScript
Tune-89474-Brown_Joak.txt 459 Plain-text file with the extracted tune(s)
Tune-89474-get.log 4383 Log file, useful mostly for debugging
These files should be available for 24 hours.