pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-76808-21153_MAYS_QUADRILLES_5.ps) >>/Users/jc/w/tmp/Tune-76808-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21153_MAYS_QUADRILLES_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
Form_76808.log 1671 Log file, useful mostly for debugging
Tune-76808-21153_MAYS_QUADRILLES_5.abc 666 ABC music file with the extracted tune(s)
Tune-76808-21153_MAYS_QUADRILLES_5.ps 36650 PostScript
Tune-76808-21153_MAYS_QUADRILLES_5.txt 666 Plain-text file with the extracted tune(s)
Tune-76808-get.log 4762 Log file, useful mostly for debugging
These files should be available for 24 hours.