pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3685-Polka05.ps) >>/Users/jc/w/tmp/Tune-3685-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/scand/Polka05.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_3685.log 987440 Log file, useful mostly for debugging
Coll_36858.log 291355 Log file, useful mostly for debugging
Tune-3685-Polka05.abc 2406 ABC music file with the extracted tune(s)
Tune-3685-Polka05.ps 58592 PostScript
Tune-3685-Polka05.txt 2406 Plain-text file with the extracted tune(s)
Tune-3685-get.log 12081 Log file, useful mostly for debugging
These files should be available for 24 hours.