pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7131-CHEVCHS3.ps) >>/Users/jc/w/tmp/Tune-7131-get.log 2>&1" returned status 256
http://sniff.numachi.com/abc/CHEVCHS3.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_71313.log 139782 Log file, useful mostly for debugging
Form_71311.log 851 Log file, useful mostly for debugging
Tune-7131-CHEVCHS3.abc 149 ABC music file with the extracted tune(s)
Tune-7131-CHEVCHS3.ps 32230 PostScript
Tune-7131-CHEVCHS3.txt 149 Plain-text file with the extracted tune(s)
Tune-7131-get.log 4090 Log file, useful mostly for debugging
Tune-71317-get.log 3812 Log file, useful mostly for debugging
These files should be available for 24 hours.