pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1224-13323_CALLER_HERRING.ps) >>/Users/jc/w/tmp/Tune-1224-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Button_Whitaker/SelectionOfDancesReelsAndWaltzes/13323_CALLER_HERRING.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_12246.log 261969 Log file, useful mostly for debugging
Form_12245.log 526 Log file, useful mostly for debugging
Tune-1224-13323_CALLER_HERRING.abc 1096 ABC music file with the extracted tune(s)
Tune-1224-13323_CALLER_HERRING.ps 38149 PostScript
Tune-1224-13323_CALLER_HERRING.txt 1096 Plain-text file with the extracted tune(s)
Tune-1224-get.log 4819 Log file, useful mostly for debugging
These files should be available for 24 hours.