pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-69857-TerpsichoreanHornpipe.ps) >>/Users/jc/w/tmp/Tune-69857-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ryan-cole/Tunes/TerpsichoreanHornpipe.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-69857-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.abc 194 ABC music file with the extracted tune(s)
Tune-69857-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.ps 6 PostScript
Tune-69857-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.txt 194 Plain-text file with the extracted tune(s)
Tune-69857-TerpsichoreanHornpipe.abc 486 ABC music file with the extracted tune(s)
Tune-69857-TerpsichoreanHornpipe.ps 37690 PostScript
Tune-69857-TerpsichoreanHornpipe.txt 486 Plain-text file with the extracted tune(s)
Tune-69857-get.log 9787 Log file, useful mostly for debugging
These files should be available for 24 hours.