pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7153-21152_MAYS_QUADRILLES_4.ps) >>/Users/jc/w/tmp/Tune-7153-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21152_MAYS_QUADRILLES_4.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_71530.log 261851 Log file, useful mostly for debugging
Coll_71539.log 261851 Log file, useful mostly for debugging
Form_7153.log 1853 Log file, useful mostly for debugging
Tune-7153-21152_MAYS_QUADRILLES_4.abc 691 ABC music file with the extracted tune(s)
Tune-7153-21152_MAYS_QUADRILLES_4.ps 36113 PostScript
Tune-7153-21152_MAYS_QUADRILLES_4.txt 691 Plain-text file with the extracted tune(s)
Tune-7153-get.log 4747 Log file, useful mostly for debugging
Tune-71532-10052_Quakers_Wife-001.svg 13303 Scalable Vector Graphics format
Tune-71532-10052_Quakers_Wife.abc 492 ABC music file with the extracted tune(s)
Tune-71532-10052_Quakers_Wife.txt 492 Plain-text file with the extracted tune(s)
Tune-71532-get.log 7744 Log file, useful mostly for debugging
Tune-71534-get.log 171915 Log file, useful mostly for debugging
These files should be available for 24 hours.