pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3996-dim.ps) >>/Users/jc/w/tmp/Tune-3996-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/dim.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Find_39964.log 1594 Log file, useful mostly for debugging
Find_39968.log 1797 Log file, useful mostly for debugging
Tune-3996-dim.abc 221 ABC music file with the extracted tune(s)
Tune-3996-dim.ps 6 PostScript
Tune-3996-dim.txt 221 Plain-text file with the extracted tune(s)
Tune-3996-get.log 3760 Log file, useful mostly for debugging
Tune-39960-get.log 4142 Log file, useful mostly for debugging
Tune-39962-get.log 4784 Log file, useful mostly for debugging
Tune-39964-get.log 11526 Log file, useful mostly for debugging
Tune-39965-get.log 5715 Log file, useful mostly for debugging
Tune-39966-get.log 91883 Log file, useful mostly for debugging
Tune-39967-get.log 102475 Log file, useful mostly for debugging
These files should be available for 24 hours.