pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3775-20251_Pantalon.ps) >>/Users/jc/w/tmp/Tune-3775-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/20251_Pantalon.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_37750.log 893019 Log file, useful mostly for debugging
Coll_37755.log 888822 Log file, useful mostly for debugging
Form_37751.log 877 Log file, useful mostly for debugging
Form_37757.log 992 Log file, useful mostly for debugging
Tune-3775-20251_Pantalon.abc 715 ABC music file with the extracted tune(s)
Tune-3775-20251_Pantalon.ps 37381 PostScript
Tune-3775-20251_Pantalon.txt 715 Plain-text file with the extracted tune(s)
Tune-3775-get.log 4472 Log file, useful mostly for debugging
These files should be available for 24 hours.