pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3021-Sancho_Pancho.ps) >>/Users/jc/w/tmp/Tune-3021-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JohnWalsh/Sancho_Pancho.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_30212.log 458410 Log file, useful mostly for debugging
Tune-3021-Sancho_Pancho.abc 1685 ABC music file with the extracted tune(s)
Tune-3021-Sancho_Pancho.ps 37712 PostScript
Tune-3021-Sancho_Pancho.txt 1685 Plain-text file with the extracted tune(s)
Tune-3021-get.log 4444 Log file, useful mostly for debugging
Tune-30211-get.log 5341 Log file, useful mostly for debugging
Tune-30214-get.log 5299 Log file, useful mostly for debugging
Tune-30217-get.log 5674 Log file, useful mostly for debugging
Tune-30218-get.log 7439 Log file, useful mostly for debugging
These files should be available for 24 hours.