pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4097-1011_the_Highland_Watch.ps) >>/Users/jc/w/tmp/Tune-4097-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1011_the_Highland_Watch.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_40974.log 1630842 Log file, useful mostly for debugging
Form_40971.log 872 Log file, useful mostly for debugging
Form_40979.log 1963 Log file, useful mostly for debugging
Tune-4097-1011_the_Highland_Watch.abc 1661 ABC music file with the extracted tune(s)
Tune-4097-1011_the_Highland_Watch.ps 48623 PostScript
Tune-4097-1011_the_Highland_Watch.txt 1661 Plain-text file with the extracted tune(s)
Tune-4097-get.log 4808 Log file, useful mostly for debugging
Tune-40977-get.log 8697 Log file, useful mostly for debugging
These files should be available for 24 hours.