pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6553-10241_Boston_Cadets.ps) >>/Users/jc/w/tmp/Tune-6553-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP1/10241_Boston_Cadets.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_65536.log 1069337 Log file, useful mostly for debugging
Coll_65539.log 632012 Log file, useful mostly for debugging
Tune-6553-10241_Boston_Cadets.abc 2108 ABC music file with the extracted tune(s)
Tune-6553-10241_Boston_Cadets.ps 57882 PostScript
Tune-6553-10241_Boston_Cadets.txt 2108 Plain-text file with the extracted tune(s)
Tune-6553-get.log 16883 Log file, useful mostly for debugging
Tune-65530-get.log 8916 Log file, useful mostly for debugging
Tune-65531-get.log 7002 Log file, useful mostly for debugging
Tune-65532-get.log 3990 Log file, useful mostly for debugging
Tune-65533-MichaelDabney_12Minuets12Dances-1760-V1.abc 176 ABC music file with the extracted tune(s)
Tune-65533-MichaelDabney_12Minuets12Dances-1760-V1.pdf 2217 Portable Data Format
Tune-65533-MichaelDabney_12Minuets12Dances-1760-V1.ps 6 PostScript
Tune-65533-MichaelDabney_12Minuets12Dances-1760-V1.txt 176 Plain-text file with the extracted tune(s)
Tune-65533-get.log 17845 Log file, useful mostly for debugging
Tune-65534-get.log 3938 Log file, useful mostly for debugging
Tune-65535-get.log 3676 Log file, useful mostly for debugging
Tune-65536-get.log 4833 Log file, useful mostly for debugging
Tune-65537-get.log 4989 Log file, useful mostly for debugging
Tune-65538-get.log 3878 Log file, useful mostly for debugging
Tune-65539-get.log 1445 Log file, useful mostly for debugging
These files should be available for 24 hours.