pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-88186-Beer_Barrel_Polka.ps) >>/Users/jc/w/tmp/Tune-88186-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Square/Beer_Barrel_Polka.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_88186.log 681945 Log file, useful mostly for debugging
Tune-88186-Beer_Barrel_Polka.abc 1056 ABC music file with the extracted tune(s)
Tune-88186-Beer_Barrel_Polka.ps 39545 PostScript
Tune-88186-Beer_Barrel_Polka.txt 1056 Plain-text file with the extracted tune(s)
Tune-88186-get.log 4583 Log file, useful mostly for debugging
These files should be available for 24 hours.