pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6517-24CountryDances_1765_Thompson.ps) >>/Users/jc/w/tmp/Tune-6517-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/24CountryDances_1765_Thompson.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_65174.log 500700 Log file, useful mostly for debugging
Coll_65177.log 662275 Log file, useful mostly for debugging
Tune-6517-24CountryDances_1765_Thompson.abc 14247 ABC music file with the extracted tune(s)
Tune-6517-24CountryDances_1765_Thompson.ps 95458 PostScript
Tune-6517-24CountryDances_1765_Thompson.txt 14247 Plain-text file with the extracted tune(s)
Tune-6517-get.log 21000 Log file, useful mostly for debugging
Tune-65173-get.log 5421 Log file, useful mostly for debugging
These files should be available for 24 hours.