pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-58177-494_Duchess_of_Yorks_Waltz.ps) >>/Users/jc/w/tmp/Tune-58177-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1803/Preston/494_Duchess_of_Yorks_Waltz.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_58177.log 287140 Log file, useful mostly for debugging
Tune-58177-494_Duchess_of_Yorks_Waltz.abc 1010 ABC music file with the extracted tune(s)
Tune-58177-494_Duchess_of_Yorks_Waltz.ps 36861 PostScript
Tune-58177-494_Duchess_of_Yorks_Waltz.txt 1010 Plain-text file with the extracted tune(s)
Tune-58177-get.log 4883 Log file, useful mostly for debugging
These files should be available for 24 hours.