pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1223-hnhanterdro0.ps) >>/Users/jc/w/tmp/Tune-1223-get.log 2>&1" returned status 256
http://norbeck.nu/abc/m/hnhanterdro0.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_12232.log 264789 Log file, useful mostly for debugging
Coll_12235.log 130707 Log file, useful mostly for debugging
Coll_12236.log 141597 Log file, useful mostly for debugging
Tune-1223-get.log 5875 Log file, useful mostly for debugging
Tune-1223-hnhanterdro0.abc 1146 ABC music file with the extracted tune(s)
Tune-1223-hnhanterdro0.ps 34552 PostScript
Tune-1223-hnhanterdro0.txt 1146 Plain-text file with the extracted tune(s)
Tune-12236-get.log 3928 Log file, useful mostly for debugging
These files should be available for 24 hours.