pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3992-ACanonbie_Ceilidh.ps) >>/Users/jc/w/tmp/Tune-3992-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/program/ACanonbie_Ceilidh.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_39921.log 257739 Log file, useful mostly for debugging
Coll_39923.log 138572 Log file, useful mostly for debugging
Coll_39926.log 301449 Log file, useful mostly for debugging
Coll_39929.log 253509 Log file, useful mostly for debugging
Form_39920.log 823 Log file, useful mostly for debugging
Tune-3992-ACanonbie_Ceilidh.abc 316 ABC music file with the extracted tune(s)
Tune-3992-ACanonbie_Ceilidh.ps 33625 PostScript
Tune-3992-ACanonbie_Ceilidh.txt 316 Plain-text file with the extracted tune(s)
Tune-3992-get.log 4372 Log file, useful mostly for debugging
These files should be available for 24 hours.