pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2841-20211_Duncans_Election.ps) >>/Users/jc/w/tmp/Tune-2841-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Hamilton/HUTB2/20211_Duncans_Election.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_28411.log 854 Log file, useful mostly for debugging
Tune-2841-20211_Duncans_Election.abc 767 ABC music file with the extracted tune(s)
Tune-2841-20211_Duncans_Election.ps 36192 PostScript
Tune-2841-20211_Duncans_Election.txt 767 Plain-text file with the extracted tune(s)
Tune-2841-get.log 4614 Log file, useful mostly for debugging
Tune-28417-get.log 2131 Log file, useful mostly for debugging
These files should be available for 24 hours.