pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4503-20721_Vive_Henri_Quatre.ps) >>/Users/jc/w/tmp/Tune-4503-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/20721_Vive_Henri_Quatre.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_45030.log 455609 Log file, useful mostly for debugging
Coll_45035.log 907021 Log file, useful mostly for debugging
Coll_45036.log 448608 Log file, useful mostly for debugging
Coll_45039.log 462610 Log file, useful mostly for debugging
Form_45036.log 1036 Log file, useful mostly for debugging
Tune-4503-20721_Vive_Henri_Quatre.abc 831 ABC music file with the extracted tune(s)
Tune-4503-20721_Vive_Henri_Quatre.ps 40355 PostScript
Tune-4503-20721_Vive_Henri_Quatre.txt 831 Plain-text file with the extracted tune(s)
Tune-4503-get.log 4654 Log file, useful mostly for debugging
These files should be available for 24 hours.