pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-926-set73.ps) >>/Users/jc/w/tmp/Tune-926-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/dinglehall.freeserve.co.uk/kyoy/abc/set73.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
Form_92664.log 827 Log file, useful mostly for debugging
Tune-926-get.log 5348 Log file, useful mostly for debugging
Tune-926-set73.abc 678 ABC music file with the extracted tune(s)
Tune-926-set73.ps 39769 PostScript
Tune-926-set73.txt 678 Plain-text file with the extracted tune(s)
Tune-92613-Cran_Hill.abc 353 ABC music file with the extracted tune(s)
Tune-92613-Cran_Hill.txt 353 Plain-text file with the extracted tune(s)
Tune-92613-get.log 3579 Log file, useful mostly for debugging
Tune-92630-RoundReelOfEight2.abc 0 ABC music file with the extracted tune(s)
Tune-92630-RoundReelOfEight2.ps 6 PostScript
Tune-92630-RoundReelOfEight2.txt 0 Plain-text file with the extracted tune(s)
Tune-92630-get.log 4715 Log file, useful mostly for debugging
Tune-92677-7550.abc 0 ABC music file with the extracted tune(s)
Tune-92677-7550.txt 0 Plain-text file with the extracted tune(s)
Tune-92677-get.log 3003 Log file, useful mostly for debugging
Tune-92688-get.log 1331726 Log file, useful mostly for debugging
These files should be available for 24 hours.