pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9100-BlackNag.ps) >>/Users/jc/w/tmp/Tune-9100-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/BlackNag.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-9100-BlackNag.abc 313 ABC music file with the extracted tune(s)
Tune-9100-BlackNag.ps 34461 PostScript
Tune-9100-BlackNag.txt 313 Plain-text file with the extracted tune(s)
Tune-9100-get.log 4354 Log file, useful mostly for debugging
Tune-91006-002_Irish_Dump.abc 622 ABC music file with the extracted tune(s)
Tune-91006-002_Irish_Dump.ps 33449 PostScript
Tune-91006-002_Irish_Dump.txt 622 Plain-text file with the extracted tune(s)
Tune-91006-get.log 4558 Log file, useful mostly for debugging
Tune-91009-092_Yogh_hone_O_hone-001.svg 16133 Scalable Vector Graphics format
Tune-91009-092_Yogh_hone_O_hone.abc 683 ABC music file with the extracted tune(s)
Tune-91009-092_Yogh_hone_O_hone.txt 683 Plain-text file with the extracted tune(s)
Tune-91009-get.log 4302 Log file, useful mostly for debugging
These files should be available for 24 hours.