pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78287-PolskaFrAppelbo.ps) >>/Users/jc/w/tmp/Tune-78287-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/scand/PolskaFrAppelbo.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_78287.log 281520 Log file, useful mostly for debugging
Tune-78287-PolskaFrAppelbo.abc 661 ABC music file with the extracted tune(s)
Tune-78287-PolskaFrAppelbo.ps 37252 PostScript
Tune-78287-PolskaFrAppelbo.txt 661 Plain-text file with the extracted tune(s)
Tune-78287-get.log 15859 Log file, useful mostly for debugging
These files should be available for 24 hours.