pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6788-AmazingGraceC.ps) >>/Users/jc/w/tmp/Tune-6788-get.log 2>&1" returned status 256
http://www.gulfweb.net/rlwalker/abc/AmazingGraceC.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_67881.log 282581 Log file, useful mostly for debugging
Coll_67884.log 257739 Log file, useful mostly for debugging
Form_67885.log 844 Log file, useful mostly for debugging
Form_67887.log 820 Log file, useful mostly for debugging
Tune-6788-AmazingGraceC.abc 986 ABC music file with the extracted tune(s)
Tune-6788-AmazingGraceC.ps 37323 PostScript
Tune-6788-AmazingGraceC.txt 986 Plain-text file with the extracted tune(s)
Tune-6788-get.log 5756 Log file, useful mostly for debugging
Tune-67886-get.log 36455 Log file, useful mostly for debugging
These files should be available for 24 hours.