pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91899-slurs.ps) >>/Users/jc/w/tmp/Tune-91899-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/scand/slurs.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_91899.log 257636 Log file, useful mostly for debugging
Tune-91899-get.log 3794 Log file, useful mostly for debugging
Tune-91899-slurs.abc 30 ABC music file with the extracted tune(s)
Tune-91899-slurs.ps 6 PostScript
Tune-91899-slurs.txt 30 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.