pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2356-00_Title.ps) >>/Users/jc/w/tmp/Tune-2356-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/HaandMeDoonDaFiddle/00_Title.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_23560.log 261010 Log file, useful mostly for debugging
Coll_23561.log 268011 Log file, useful mostly for debugging
Coll_23562.log 722221 Log file, useful mostly for debugging
Coll_23565.log 329155 Log file, useful mostly for debugging
Form_23565.log 917 Log file, useful mostly for debugging
Form_23569.log 1210 Log file, useful mostly for debugging
Tune-2356-00_Title.abc 248 ABC music file with the extracted tune(s)
Tune-2356-00_Title.ps 30621 PostScript
Tune-2356-00_Title.txt 248 Plain-text file with the extracted tune(s)
Tune-2356-get.log 7487 Log file, useful mostly for debugging
Tune-23561-get.log 4981 Log file, useful mostly for debugging
Tune-23562-get.log 8080 Log file, useful mostly for debugging
Tune-23564-get.log 3199 Log file, useful mostly for debugging
Tune-23568-get.log 9549 Log file, useful mostly for debugging
Tune-23569-get.log 11197 Log file, useful mostly for debugging
These files should be available for 24 hours.