pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28753-72nd_Highlanders_Farewell_to_Aberdeen-D-32-2.ps) >>/Users/jc/w/tmp/Tune-28753-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/march0/72nd_Highlanders_Farewell_to_Aberdeen-D-32-2.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_28753.log 870 Log file, useful mostly for debugging
Tune-28753-72nd_Highlanders_Farewell_to_Aberdeen-D-32-2.abc 708 ABC music file with the extracted tune(s)
Tune-28753-72nd_Highlanders_Farewell_to_Aberdeen-D-32-2.ps 34211 PostScript
Tune-28753-72nd_Highlanders_Farewell_to_Aberdeen-D-32-2.txt 708 Plain-text file with the extracted tune(s)
Tune-28753-get.log 8884 Log file, useful mostly for debugging
These files should be available for 24 hours.