pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7077-17_Marmonts_Retreat.ps) >>/Users/jc/w/tmp/Tune-7077-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1813/Button_Whitaker/17_Marmonts_Retreat.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_70770.log 284330 Log file, useful mostly for debugging
Coll_70772.log 571470 Log file, useful mostly for debugging
Coll_70776.log 97314 Log file, useful mostly for debugging
Tune-7077-17_Marmonts_Retreat.abc 1116 ABC music file with the extracted tune(s)
Tune-7077-17_Marmonts_Retreat.ps 34442 PostScript
Tune-7077-17_Marmonts_Retreat.txt 1116 Plain-text file with the extracted tune(s)
Tune-7077-get.log 4751 Log file, useful mostly for debugging
These files should be available for 24 hours.