pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-62974-Aime_Gagnon.ps) >>/Users/jc/w/tmp/Tune-62974-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Quebec/Aime_Gagnon.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Find_62974.log 1502 Log file, useful mostly for debugging
Tune-62974-Aime_Gagnon.abc 2028 ABC music file with the extracted tune(s)
Tune-62974-Aime_Gagnon.ps 48823 PostScript
Tune-62974-Aime_Gagnon.txt 2028 Plain-text file with the extracted tune(s)
Tune-62974-get.log 11852 Log file, useful mostly for debugging
These files should be available for 24 hours.