pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1514-GlenGrant-AL.ps) >>/Users/jc/w/tmp/Tune-1514-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Book17/GlenGrant-AL.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_15143.log 259149 Log file, useful mostly for debugging
Form_15148.log 826 Log file, useful mostly for debugging
Tune-1514-GlenGrant-AL.abc 613 ABC music file with the extracted tune(s)
Tune-1514-GlenGrant-AL.ps 39920 PostScript
Tune-1514-GlenGrant-AL.txt 613 Plain-text file with the extracted tune(s)
Tune-1514-get.log 8466 Log file, useful mostly for debugging
Tune-15149-get.log 2924 Log file, useful mostly for debugging
These files should be available for 24 hours.