pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-24939-20761-Wrights_Quick_Step-V1.ps) >>/Users/jc/w/tmp/Tune-24939-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP2/20761-Wrights_Quick_Step-V1.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-24939-20761-Wrights_Quick_Step-V1.abc 1068 ABC music file with the extracted tune(s)
Tune-24939-20761-Wrights_Quick_Step-V1.ps 36549 PostScript
Tune-24939-20761-Wrights_Quick_Step-V1.txt 1068 Plain-text file with the extracted tune(s)
Tune-24939-get.log 9458 Log file, useful mostly for debugging
These files should be available for 24 hours.