pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22017-30525_Madam_Didelots_Fancy.ps) >>/Users/jc/w/tmp/Tune-22017-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/30525_Madam_Didelots_Fancy.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_22017.log 574134 Log file, useful mostly for debugging
Tune-22017-30525_Madam_Didelots_Fancy.abc 713 ABC music file with the extracted tune(s)
Tune-22017-30525_Madam_Didelots_Fancy.ps 33288 PostScript
Tune-22017-30525_Madam_Didelots_Fancy.txt 713 Plain-text file with the extracted tune(s)
Tune-22017-get.log 5097 Log file, useful mostly for debugging
These files should be available for 24 hours.