pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9070-21172_Barcarole_Sett_tune_5.ps) >>/Users/jc/w/tmp/Tune-9070-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP2/21172_Barcarole_Sett_tune_5.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-9070-21172_Barcarole_Sett_tune_5.abc 1062 ABC music file with the extracted tune(s)
Tune-9070-21172_Barcarole_Sett_tune_5.ps 35013 PostScript
Tune-9070-21172_Barcarole_Sett_tune_5.txt 1062 Plain-text file with the extracted tune(s)
Tune-9070-get.log 5061 Log file, useful mostly for debugging
Tune-90704-get.log 1375 Log file, useful mostly for debugging
Tune-90705-WilliamShepherdsCollections.abc 164 ABC music file with the extracted tune(s)
Tune-90705-WilliamShepherdsCollections.ps 6 PostScript
Tune-90705-WilliamShepherdsCollections.txt 164 Plain-text file with the extracted tune(s)
Tune-90705-get.log 4352 Log file, useful mostly for debugging
Tune-90709-get.log 14697 Log file, useful mostly for debugging
These files should be available for 24 hours.