pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-391-CJ03.ps) >>/Users/jc/w/tmp/Tune-391-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CJ03.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_3911.log 143412 Log file, useful mostly for debugging
Coll_39119.log 142807 Log file, useful mostly for debugging
Coll_39146.log 273249 Log file, useful mostly for debugging
Coll_39186.log 138572 Log file, useful mostly for debugging
Form_39107.log 726 Log file, useful mostly for debugging
Form_39130.log 770 Log file, useful mostly for debugging
Sess-39192.log 1265848 Log file, useful mostly for debugging
Tune-391-CJ03.abc 440 ABC music file with the extracted tune(s)
Tune-391-CJ03.ps 34827 PostScript
Tune-391-CJ03.txt 440 Plain-text file with the extracted tune(s)
Tune-391-get.log 3958 Log file, useful mostly for debugging
Tune-3910-get.log 5505 Log file, useful mostly for debugging
Tune-39120-get.log 4139 Log file, useful mostly for debugging
Tune-39147-get.log 3632 Log file, useful mostly for debugging
Tune-39150-get.log 30118 Log file, useful mostly for debugging
Tune-39159-get.log 3948 Log file, useful mostly for debugging
Tune-39185-get.log 2986 Log file, useful mostly for debugging
These files should be available for 24 hours.