pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9900-3032-the_Highland_President.ps) >>/Users/jc/w/tmp/Tune-9900-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/3032-the_Highland_President.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_9900.log 1291715 Log file, useful mostly for debugging
Coll_99003.log 1097825 Log file, useful mostly for debugging
Coll_99006.log 131838 Log file, useful mostly for debugging
Coll_99007.log 1315601 Log file, useful mostly for debugging
Form_9900.log 886 Log file, useful mostly for debugging
Tune-9900-3032-the_Highland_President.abc 1157 ABC music file with the extracted tune(s)
Tune-9900-3032-the_Highland_President.ps 45262 PostScript
Tune-9900-3032-the_Highland_President.txt 1157 Plain-text file with the extracted tune(s)
Tune-9900-get.log 4838 Log file, useful mostly for debugging
Tune-99000-get.log 19802 Log file, useful mostly for debugging
Tune-99007-get.log 4074 Log file, useful mostly for debugging
Tune-99009-get.log 5399 Log file, useful mostly for debugging
These files should be available for 24 hours.