pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-81755-32662_SANDY_McGAFF_Jig.ps) >>/Users/jc/w/tmp/Tune-81755-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/32662_SANDY_McGAFF_Jig.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_81755.log 263256 Log file, useful mostly for debugging
Tune-81755-32662_SANDY_McGAFF_Jig.abc 572 ABC music file with the extracted tune(s)
Tune-81755-32662_SANDY_McGAFF_Jig.ps 34600 PostScript
Tune-81755-32662_SANDY_McGAFF_Jig.txt 572 Plain-text file with the extracted tune(s)
Tune-81755-get.log 4739 Log file, useful mostly for debugging
These files should be available for 24 hours.