pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6727-4152-the_Shepherds_Son-abc1.ps) >>/Users/jc/w/tmp/Tune-6727-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/4152-the_Shepherds_Son-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_6727.log 1197580 Log file, useful mostly for debugging
Coll_67271.log 1262210 Log file, useful mostly for debugging
Coll_67276.log 1373206 Log file, useful mostly for debugging
Tune-6727-4152-the_Shepherds_Son-abc1.abc 1948 ABC music file with the extracted tune(s)
Tune-6727-4152-the_Shepherds_Son-abc1.ps 50693 PostScript
Tune-6727-4152-the_Shepherds_Son-abc1.txt 1948 Plain-text file with the extracted tune(s)
Tune-6727-get.log 4779 Log file, useful mostly for debugging
Tune-67270-get.log 4171 Log file, useful mostly for debugging
Tune-67277-get.log 4040 Log file, useful mostly for debugging
These files should be available for 24 hours.