pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-98944-432_When_the_Hollow_Drum.ps) >>/Users/jc/w/tmp/Tune-98944-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JohnTreat/GftF/432_When_the_Hollow_Drum.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-98944-24CountryDances_1813_Button_Whitaker.abc 184 ABC music file with the extracted tune(s)
Tune-98944-24CountryDances_1813_Button_Whitaker.ps 6 PostScript
Tune-98944-24CountryDances_1813_Button_Whitaker.txt 184 Plain-text file with the extracted tune(s)
Tune-98944-432_When_the_Hollow_Drum.abc 746 ABC music file with the extracted tune(s)
Tune-98944-432_When_the_Hollow_Drum.ps 35585 PostScript
Tune-98944-432_When_the_Hollow_Drum.txt 746 Plain-text file with the extracted tune(s)
Tune-98944-get.log 9457 Log file, useful mostly for debugging
These files should be available for 24 hours.