pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-95859-B-barndance.ps) >>/Users/jc/w/tmp/Tune-95859-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/thisoldtractor.com/B-barndance.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_95859.log 824 Log file, useful mostly for debugging
Tune-95859-B-barndance.abc 838 ABC music file with the extracted tune(s)
Tune-95859-B-barndance.ps 39245 PostScript
Tune-95859-B-barndance.txt 838 Plain-text file with the extracted tune(s)
Tune-95859-get.log 7315 Log file, useful mostly for debugging
These files should be available for 24 hours.