pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2789-11031_.ps) >>/Users/jc/w/tmp/Tune-2789-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP1/11031_.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-2789-11031_.abc 33 ABC music file with the extracted tune(s)
Tune-2789-11031_.ps 6 PostScript
Tune-2789-11031_.txt 33 Plain-text file with the extracted tune(s)
Tune-2789-get.log 3979 Log file, useful mostly for debugging
Tune-27898-get.log 1293 Log file, useful mostly for debugging
Tune-27899-AMHSI_abc2.abc 147 ABC music file with the extracted tune(s)
Tune-27899-AMHSI_abc2.pdf 2217 Portable Data Format
Tune-27899-AMHSI_abc2.ps 6 PostScript
Tune-27899-AMHSI_abc2.txt 147 Plain-text file with the extracted tune(s)
Tune-27899-get.log 4880 Log file, useful mostly for debugging
These files should be available for 24 hours.