pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-247-Justice_Busy.ps) >>/Users/jc/w/tmp/Tune-247-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JohnWalsh/Justice_Busy.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_24700.log 457009 Log file, useful mostly for debugging
Coll_24708.log 452810 Log file, useful mostly for debugging
Coll_24711.log 447211 Log file, useful mostly for debugging
Coll_2472.log 466810 Log file, useful mostly for debugging
Coll_24723.log 461210 Log file, useful mostly for debugging
Coll_24724.log 935020 Log file, useful mostly for debugging
Coll_24735.log 468209 Log file, useful mostly for debugging
Coll_24736.log 462611 Log file, useful mostly for debugging
Coll_24741.log 465410 Log file, useful mostly for debugging
Coll_24747.log 1372430 Log file, useful mostly for debugging
Coll_24759.log 459810 Log file, useful mostly for debugging
Coll_24769.log 457010 Log file, useful mostly for debugging
Coll_24770.log 454210 Log file, useful mostly for debugging
Coll_24771.log 459810 Log file, useful mostly for debugging
Coll_24782.log 447210 Log file, useful mostly for debugging
Coll_24783.log 452810 Log file, useful mostly for debugging
Coll_24794.log 450011 Log file, useful mostly for debugging
Find_24789.log 1591 Log file, useful mostly for debugging
Form_24706.log 835 Log file, useful mostly for debugging
Form_24735.log 1010 Log file, useful mostly for debugging
Form_24741.log 964 Log file, useful mostly for debugging
Tune-247-Justice_Busy.abc 1052 ABC music file with the extracted tune(s)
Tune-247-Justice_Busy.ps 34146 PostScript
Tune-247-Justice_Busy.txt 1052 Plain-text file with the extracted tune(s)
Tune-247-get.log 4400 Log file, useful mostly for debugging
Tune-24709-get.log 4205 Log file, useful mostly for debugging
Tune-24713-get.log 6432 Log file, useful mostly for debugging
Tune-24720-get.log 5429 Log file, useful mostly for debugging
Tune-24752-get.log 5942 Log file, useful mostly for debugging
Tune-24758-get.log 4258 Log file, useful mostly for debugging
Tune-24785-get.log 1394 Log file, useful mostly for debugging
Tune-24790-get.log 1394 Log file, useful mostly for debugging
Tune-24793-get.log 5902 Log file, useful mostly for debugging
Tune-24797-get.log 1655 Log file, useful mostly for debugging
These files should be available for 24 hours.