pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3456-LochielsAwaToFrance_Am_24.ps) >>/Users/jc/w/tmp/Tune-3456-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/r24/LochielsAwaToFrance_Am_24.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_34561.log 257739 Log file, useful mostly for debugging
Coll_34562.log 137967 Log file, useful mostly for debugging
Coll_34565.log 144622 Log file, useful mostly for debugging
Coll_34567.log 141597 Log file, useful mostly for debugging
Coll_34569.log 280291 Log file, useful mostly for debugging
Tune-3456-LochielsAwaToFrance_Am_24.abc 445 ABC music file with the extracted tune(s)
Tune-3456-LochielsAwaToFrance_Am_24.ps 35393 PostScript
Tune-3456-LochielsAwaToFrance_Am_24.txt 445 Plain-text file with the extracted tune(s)
Tune-3456-get.log 4659 Log file, useful mostly for debugging
Tune-34563-get.log 2432 Log file, useful mostly for debugging
These files should be available for 24 hours.