pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8377-Petronella_1.ps) >>/Users/jc/w/tmp/Tune-8377-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/sls.hawaii.edu/Petronella_1.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
Form_83773.log 835 Log file, useful mostly for debugging
Form_83774.log 848 Log file, useful mostly for debugging
Form_83779.log 824 Log file, useful mostly for debugging
Tune-8377-Petronella_1.abc 389 ABC music file with the extracted tune(s)
Tune-8377-Petronella_1.ps 34648 PostScript
Tune-8377-Petronella_1.txt 389 Plain-text file with the extracted tune(s)
Tune-8377-get.log 4342 Log file, useful mostly for debugging
Tune-83774-get.log 37407 Log file, useful mostly for debugging
These files should be available for 24 hours.