pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-23806-099_Petronella.ps) >>/Users/jc/w/tmp/Tune-23806-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/NEFR/X/099_Petronella.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_23806.log 69044 Log file, useful mostly for debugging
Form_23806.log 757 Log file, useful mostly for debugging
Tune-23806-099_Petronella.abc 435 ABC music file with the extracted tune(s)
Tune-23806-099_Petronella.ps 35432 PostScript
Tune-23806-099_Petronella.txt 435 Plain-text file with the extracted tune(s)
Tune-23806-get.log 8528 Log file, useful mostly for debugging
These files should be available for 24 hours.