pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8546-EliasHowe_MusiciansCompanionP1-1842-V2.ps) >>/Users/jc/w/tmp/Tune-8546-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe_MusiciansCompanionP1-1842-V2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_8546.log 375655 Log file, useful mostly for debugging
Coll_85464.log 679135 Log file, useful mostly for debugging
Coll_85467.log 318050 Log file, useful mostly for debugging
Tune-8546-EliasHowe_MusiciansCompanionP1-1842-V2.abc 297553 ABC music file with the extracted tune(s)
Tune-8546-EliasHowe_MusiciansCompanionP1-1842-V2.ps 2542747 PostScript
Tune-8546-EliasHowe_MusiciansCompanionP1-1842-V2.txt 297553 Plain-text file with the extracted tune(s)
Tune-8546-get.log 216440 Log file, useful mostly for debugging
Tune-85463-get.log 4329 Log file, useful mostly for debugging
Tune-85469-get.log 4445 Log file, useful mostly for debugging
These files should be available for 24 hours.