pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1975-MayYarkersStr1.ps) >>/Users/jc/w/tmp/Tune-1975-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/MayYarkersStr1.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_19755.log 136152 Log file, useful mostly for debugging
Find_19754.log 1625 Log file, useful mostly for debugging
Form_19755.log 850 Log file, useful mostly for debugging
Tune-1975-MayYarkersStr1.abc 2353 ABC music file with the extracted tune(s)
Tune-1975-MayYarkersStr1.ps 58577 PostScript
Tune-1975-MayYarkersStr1.txt 2353 Plain-text file with the extracted tune(s)
Tune-1975-get.log 9590 Log file, useful mostly for debugging
Tune-19754-get.log 3038 Log file, useful mostly for debugging
Tune-19755-get.log 7626 Log file, useful mostly for debugging
Tune-19758-get.log 2978 Log file, useful mostly for debugging
These files should be available for 24 hours.