pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-50995-1063-Lady_Charlotte_Murrays_Jig.ps) >>/Users/jc/w/tmp/Tune-50995-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/1063-Lady_Charlotte_Murrays_Jig.abc1.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_50995.log 128616 Log file, useful mostly for debugging
Tune-50995-1063-Lady_Charlotte_Murrays_Jig.abc 1081 ABC music file with the extracted tune(s)
Tune-50995-1063-Lady_Charlotte_Murrays_Jig.ps 39123 PostScript
Tune-50995-1063-Lady_Charlotte_Murrays_Jig.txt 1081 Plain-text file with the extracted tune(s)
Tune-50995-get.log 4977 Log file, useful mostly for debugging
These files should be available for 24 hours.