pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7082-21300_BEAUTIFUL_DANUBE.ps) >>/Users/jc/w/tmp/Tune-7082-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21300_BEAUTIFUL_DANUBE.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_7082.log 275903 Log file, useful mostly for debugging
Coll_70822.log 132484 Log file, useful mostly for debugging
Coll_70829.log 260446 Log file, useful mostly for debugging
Form_70820.log 1022 Log file, useful mostly for debugging
Form_70823.log 831 Log file, useful mostly for debugging
Form_70824.log 1089 Log file, useful mostly for debugging
Tune-7082-21300_BEAUTIFUL_DANUBE.abc 391 ABC music file with the extracted tune(s)
Tune-7082-21300_BEAUTIFUL_DANUBE.ps 30729 PostScript
Tune-7082-21300_BEAUTIFUL_DANUBE.txt 391 Plain-text file with the extracted tune(s)
Tune-7082-get.log 4744 Log file, useful mostly for debugging
Tune-70822-10911_THE_HIGHLANDS_OF_BANFFSHIRE.abc 684 ABC music file with the extracted tune(s)
Tune-70822-10911_THE_HIGHLANDS_OF_BANFFSHIRE.ps 38208 PostScript
Tune-70822-10911_THE_HIGHLANDS_OF_BANFFSHIRE.txt 684 Plain-text file with the extracted tune(s)
Tune-70822-get.log 5100 Log file, useful mostly for debugging
Tune-70825-get.log 3574 Log file, useful mostly for debugging
These files should be available for 24 hours.