pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68593-20392_Scipios_Hornpipe.ps) >>/Users/jc/w/tmp/Tune-68593-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/20392_Scipios_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
Tune-68593-20392_Scipios_Hornpipe.abc 744 ABC music file with the extracted tune(s)
Tune-68593-20392_Scipios_Hornpipe.ps 34907 PostScript
Tune-68593-20392_Scipios_Hornpipe.txt 744 Plain-text file with the extracted tune(s)
Tune-68593-Gow-CSR4-abc2.abc 150 ABC music file with the extracted tune(s)
Tune-68593-Gow-CSR4-abc2.ps 6 PostScript
Tune-68593-Gow-CSR4-abc2.txt 150 Plain-text file with the extracted tune(s)
Tune-68593-get.log 9090 Log file, useful mostly for debugging
These files should be available for 24 hours.