pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-33040-Waltz_Air_1.ps) >>/Users/jc/w/tmp/Tune-33040-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Perron-Miller/Waltz_Air_1.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-33040-IgnatiusSancho_MCCD_v1.abc 159 ABC music file with the extracted tune(s)
Tune-33040-IgnatiusSancho_MCCD_v1.ps 6 PostScript
Tune-33040-IgnatiusSancho_MCCD_v1.txt 159 Plain-text file with the extracted tune(s)
Tune-33040-Waltz_Air_1.abc 402 ABC music file with the extracted tune(s)
Tune-33040-Waltz_Air_1.ps 32970 PostScript
Tune-33040-Waltz_Air_1.txt 402 Plain-text file with the extracted tune(s)
Tune-33040-get.log 8782 Log file, useful mostly for debugging
These files should be available for 24 hours.