pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4833-KrivoHoro1.ps) >>/Users/jc/w/tmp/Tune-4833-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Balkan/KrivoHoro1.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_4833.log 147320 Log file, useful mostly for debugging
Coll_48337.log 893841 Log file, useful mostly for debugging
Coll_48339.log 284330 Log file, useful mostly for debugging
Tune-4833-KrivoHoro1.abc 1187 ABC music file with the extracted tune(s)
Tune-4833-KrivoHoro1.ps 49761 PostScript
Tune-4833-KrivoHoro1.txt 1187 Plain-text file with the extracted tune(s)
Tune-4833-get.log 4287 Log file, useful mostly for debugging
Tune-48332-EtDodimKala_E.abc 318 ABC music file with the extracted tune(s)
Tune-48332-EtDodimKala_E.ps 32847 PostScript
Tune-48332-EtDodimKala_E.txt 318 Plain-text file with the extracted tune(s)
Tune-48332-get.log 4447 Log file, useful mostly for debugging
Tune-48336-get.log 1393 Log file, useful mostly for debugging
These files should be available for 24 hours.