pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78451-1091_Captain_Keelers_Reel.ps) >>/Users/jc/w/tmp/Tune-78451-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1091_Captain_Keelers_Reel.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_78451.log 493679 Log file, useful mostly for debugging
Tune-78451-1091_Captain_Keelers_Reel.abc 902 ABC music file with the extracted tune(s)
Tune-78451-1091_Captain_Keelers_Reel.ps 38026 PostScript
Tune-78451-1091_Captain_Keelers_Reel.txt 902 Plain-text file with the extracted tune(s)
Tune-78451-get.log 9819 Log file, useful mostly for debugging
These files should be available for 24 hours.