pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1581-702_Frog_and_Mouse.ps) >>/Users/jc/w/tmp/Tune-1581-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1778/Thompson/702_Frog_and_Mouse.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_15813.log 154414 Log file, useful mostly for debugging
Coll_15814.log 287140 Log file, useful mostly for debugging
Coll_15818.log 267470 Log file, useful mostly for debugging
Tune-1581-702_Frog_and_Mouse.abc 926 ABC music file with the extracted tune(s)
Tune-1581-702_Frog_and_Mouse.ps 33517 PostScript
Tune-1581-702_Frog_and_Mouse.txt 926 Plain-text file with the extracted tune(s)
Tune-1581-get.log 4664 Log file, useful mostly for debugging
Tune-15813-get.log 5934 Log file, useful mostly for debugging
Tune-15816-get.log 1396 Log file, useful mostly for debugging
Tune-15817-get.log 5244 Log file, useful mostly for debugging
These files should be available for 24 hours.