pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2562-ReelDeMontreal.ps) >>/Users/jc/w/tmp/Tune-2562-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/ReelDeMontreal.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_25622.log 416400 Log file, useful mostly for debugging
Tune-2562-ReelDeMontreal.abc 1458 ABC music file with the extracted tune(s)
Tune-2562-ReelDeMontreal.ps 42881 PostScript
Tune-2562-ReelDeMontreal.txt 1458 Plain-text file with the extracted tune(s)
Tune-2562-get.log 5601 Log file, useful mostly for debugging
Tune-25623-get.log 4270 Log file, useful mostly for debugging
Tune-25624-get.log 5790 Log file, useful mostly for debugging
These files should be available for 24 hours.