pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-612-SelectionOfDancesReelsAndWaltzes_1.ps) >>/Users/jc/w/tmp/Tune-612-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Button_Whitaker/SelectionOfDancesReelsAndWaltzes_1.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_61205.log 316931 Log file, useful mostly for debugging
Coll_61213.log 318076 Log file, useful mostly for debugging
Coll_61218.log 316931 Log file, useful mostly for debugging
Coll_61221.log 149462 Log file, useful mostly for debugging
Coll_61226.log 983321 Log file, useful mostly for debugging
Coll_61249.log 269019 Log file, useful mostly for debugging
Coll_61251.log 2825299 Log file, useful mostly for debugging
Coll_61274.log 276069 Log file, useful mostly for debugging
Find_61227.log 1455 Log file, useful mostly for debugging
Find_61229.log 1429 Log file, useful mostly for debugging
Form_61248.log 730 Log file, useful mostly for debugging
Tune-612-SelectionOfDancesReelsAndWaltzes_1.abc 1341 ABC music file with the extracted tune(s)
Tune-612-SelectionOfDancesReelsAndWaltzes_1.ps 37248 PostScript
Tune-612-SelectionOfDancesReelsAndWaltzes_1.txt 1341 Plain-text file with the extracted tune(s)
Tune-612-get.log 11012 Log file, useful mostly for debugging
Tune-61207-get.log 2791 Log file, useful mostly for debugging
Tune-61214-get.log 2990 Log file, useful mostly for debugging
Tune-61222-get.log 4193 Log file, useful mostly for debugging
Tune-61235-get.log 84122 Log file, useful mostly for debugging
Tune-61245-get.log 3923 Log file, useful mostly for debugging
Tune-61257-get.log 4662 Log file, useful mostly for debugging
Tune-61260-get.log 2917 Log file, useful mostly for debugging
Tune-61262-get.log 4474 Log file, useful mostly for debugging
Tune-61271-get.log 2883 Log file, useful mostly for debugging
Tune-61275-get.log 5463 Log file, useful mostly for debugging
Tune-61276-get.log 2222 Log file, useful mostly for debugging
Tune-61279-get.log 1484 Log file, useful mostly for debugging
Tune-61283-get.log 3503 Log file, useful mostly for debugging
Tune-61294-get.log 5045 Log file, useful mostly for debugging
Tune-61297-get.log 8420 Log file, useful mostly for debugging
These files should be available for 24 hours.