pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1872-EliasHowe_MusiciansCompanionP3-1844-V2.ps) >>/Users/jc/w/tmp/Tune-1872-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe_MusiciansCompanionP3-1844-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_18721.log 738145 Log file, useful mostly for debugging
Coll_18725.log 600455 Log file, useful mostly for debugging
Tune-1872-EliasHowe_MusiciansCompanionP3-1844-V2.abc 382592 ABC music file with the extracted tune(s)
Tune-1872-EliasHowe_MusiciansCompanionP3-1844-V2.ps 2719043 PostScript
Tune-1872-EliasHowe_MusiciansCompanionP3-1844-V2.txt 382592 Plain-text file with the extracted tune(s)
Tune-1872-get.log 346568 Log file, useful mostly for debugging
Tune-18723-get.log 5433 Log file, useful mostly for debugging
Tune-18724-get.log 4490 Log file, useful mostly for debugging
Tune-18729-get.log 5793 Log file, useful mostly for debugging
These files should be available for 24 hours.