pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8786-30394_Hopser_or_Hop_Waltz.ps) >>/Users/jc/w/tmp/Tune-8786-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/30394_Hopser_or_Hop_Waltz.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_8786.log 450010 Log file, useful mostly for debugging
Coll_87862.log 471010 Log file, useful mostly for debugging
Coll_87868.log 455609 Log file, useful mostly for debugging
Form_8786.log 1037 Log file, useful mostly for debugging
Form_87864.log 976 Log file, useful mostly for debugging
Tune-8786-30394_Hopser_or_Hop_Waltz.abc 747 ABC music file with the extracted tune(s)
Tune-8786-30394_Hopser_or_Hop_Waltz.ps 35096 PostScript
Tune-8786-30394_Hopser_or_Hop_Waltz.txt 747 Plain-text file with the extracted tune(s)
Tune-8786-get.log 5006 Log file, useful mostly for debugging
These files should be available for 24 hours.