pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18995-21141_MAYS_QUADRILLES_1.ps) >>/Users/jc/w/tmp/Tune-18995-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21141_MAYS_QUADRILLES_1.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_18995.log 316646 Log file, useful mostly for debugging
Tune-18995-21141_MAYS_QUADRILLES_1.abc 738 ABC music file with the extracted tune(s)
Tune-18995-21141_MAYS_QUADRILLES_1.ps 37213 PostScript
Tune-18995-21141_MAYS_QUADRILLES_1.txt 738 Plain-text file with the extracted tune(s)
Tune-18995-get.log 4764 Log file, useful mostly for debugging
These files should be available for 24 hours.