pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2169-1785_Cantelo_24AmericanCountryDances.ps) >>/Users/jc/w/tmp/Tune-2169-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1785_Cantelo_24AmericanCountryDances.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_21692.log 68234 Log file, useful mostly for debugging
Coll_21696.log 63374 Log file, useful mostly for debugging
Find_21691.log 1505 Log file, useful mostly for debugging
Form_21690.log 775 Log file, useful mostly for debugging
Form_21693.log 747 Log file, useful mostly for debugging
Form_21696.log 739 Log file, useful mostly for debugging
Form_21698.log 764 Log file, useful mostly for debugging
Form_21699.log 767 Log file, useful mostly for debugging
Tune-2169-1785_Cantelo_24AmericanCountryDances.abc 1420 ABC music file with the extracted tune(s)
Tune-2169-1785_Cantelo_24AmericanCountryDances.ps 41666 PostScript
Tune-2169-1785_Cantelo_24AmericanCountryDances.txt 1420 Plain-text file with the extracted tune(s)
Tune-2169-get.log 4930 Log file, useful mostly for debugging
Tune-21691-get.log 3207 Log file, useful mostly for debugging
Tune-21694-get.log 1373 Log file, useful mostly for debugging
These files should be available for 24 hours.