pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9574-21892_GRAPE_VINE_TWIST_HORNPIPE.ps) >>/Users/jc/w/tmp/Tune-9574-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21892_GRAPE_VINE_TWIST_HORNPIPE.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_95745.log 274497 Log file, useful mostly for debugging
Coll_95749.log 253421 Log file, useful mostly for debugging
Form_95741.log 818 Log file, useful mostly for debugging
Tune-9574-21892_GRAPE_VINE_TWIST_HORNPIPE.abc 624 ABC music file with the extracted tune(s)
Tune-9574-21892_GRAPE_VINE_TWIST_HORNPIPE.ps 37537 PostScript
Tune-9574-21892_GRAPE_VINE_TWIST_HORNPIPE.txt 624 Plain-text file with the extracted tune(s)
Tune-9574-get.log 6555 Log file, useful mostly for debugging
Tune-95740-get.log 8824 Log file, useful mostly for debugging
Tune-95746-get.log 6352 Log file, useful mostly for debugging
Tune-95747-get.log 8065 Log file, useful mostly for debugging
Tune-95748-get.log 10928 Log file, useful mostly for debugging
These files should be available for 24 hours.