pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9992-68_DibdinsFancy.ps) >>/Users/jc/w/tmp/Tune-9992-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1791/Thompson/68_DibdinsFancy.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_99924.log 289950 Log file, useful mostly for debugging
Coll_99926.log 284330 Log file, useful mostly for debugging
Tune-9992-68_DibdinsFancy.abc 674 ABC music file with the extracted tune(s)
Tune-9992-68_DibdinsFancy.ps 33598 PostScript
Tune-9992-68_DibdinsFancy.txt 674 Plain-text file with the extracted tune(s)
Tune-9992-get.log 13032 Log file, useful mostly for debugging
Tune-99924-get.log 3618 Log file, useful mostly for debugging
Tune-99926-get.log 4430 Log file, useful mostly for debugging
Tune-99928-get.log 3804 Log file, useful mostly for debugging
Tune-99928-slurs.abc 30 ABC music file with the extracted tune(s)
Tune-99928-slurs.ps 6 PostScript
Tune-99928-slurs.txt 30 Plain-text file with the extracted tune(s)
Tune-99929-get.log 5782 Log file, useful mostly for debugging
These files should be available for 24 hours.