pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54127-Willie_Brewed_a_Peck_o_Maut_G.ps) >>/Users/jc/w/tmp/Tune-54127-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/reel/Willie_Brewed_a_Peck_o_Maut_G.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
Tune-54127-Willie_Brewed_a_Peck_o_Maut_G.abc 583 ABC music file with the extracted tune(s)
Tune-54127-Willie_Brewed_a_Peck_o_Maut_G.ps 35292 PostScript
Tune-54127-Willie_Brewed_a_Peck_o_Maut_G.txt 583 Plain-text file with the extracted tune(s)
Tune-54127-get.log 5255 Log file, useful mostly for debugging
These files should be available for 24 hours.