pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2705-14_SLEEP_SOOND_IDA_MOARNIN.ps) >>/Users/jc/w/tmp/Tune-2705-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/HaandMeDoonDaFiddle/14_SLEEP_SOOND_IDA_MOARNIN.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_27055.log 473809 Log file, useful mostly for debugging
Coll_27056.log 277810 Log file, useful mostly for debugging
Coll_27057.log 276409 Log file, useful mostly for debugging
Coll_27058.log 263809 Log file, useful mostly for debugging
Coll_27059.log 209 Log file, useful mostly for debugging
Tune-2705-14_SLEEP_SOOND_IDA_MOARNIN.abc 1265 ABC music file with the extracted tune(s)
Tune-2705-14_SLEEP_SOOND_IDA_MOARNIN.ps 37998 PostScript
Tune-2705-14_SLEEP_SOOND_IDA_MOARNIN.txt 1265 Plain-text file with the extracted tune(s)
Tune-2705-get.log 4925 Log file, useful mostly for debugging
Tune-27051-get.log 4777 Log file, useful mostly for debugging
Tune-27053-get.log 5622 Log file, useful mostly for debugging
These files should be available for 24 hours.