pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1792-21301_Pantalon.ps) >>/Users/jc/w/tmp/Tune-1792-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ERM/21301_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_17924.log 296976 Log file, useful mostly for debugging
Coll_17926.log 263256 Log file, useful mostly for debugging
Form_17923.log 850 Log file, useful mostly for debugging
Form_17924.log 944 Log file, useful mostly for debugging
Form_17926.log 824 Log file, useful mostly for debugging
Form_17928.log 1904 Log file, useful mostly for debugging
Form_17929.log 994 Log file, useful mostly for debugging
Tune-1792-21301_Pantalon.abc 737 ABC music file with the extracted tune(s)
Tune-1792-21301_Pantalon.ps 37935 PostScript
Tune-1792-21301_Pantalon.txt 737 Plain-text file with the extracted tune(s)
Tune-1792-get.log 4426 Log file, useful mostly for debugging
Tune-17921-get.log 6075 Log file, useful mostly for debugging
Tune-17923-184_the_Squirrel.abc 1089 ABC music file with the extracted tune(s)
Tune-17923-184_the_Squirrel.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-17923-184_the_Squirrel.ps 34794 PostScript
Tune-17923-184_the_Squirrel.txt 1089 Plain-text file with the extracted tune(s)
Tune-17923-get.log 5445 Log file, useful mostly for debugging
Tune-17924-get.log 5843 Log file, useful mostly for debugging
Tune-17929-get.log 3948 Log file, useful mostly for debugging
These files should be available for 24 hours.