pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3238-BurnsWaltzes.ps) >>/Users/jc/w/tmp/Tune-3238-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/program/20200127/BurnsWaltzes.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_3238.log 67694 Log file, useful mostly for debugging
Form_32380.log 796 Log file, useful mostly for debugging
Form_32384.log 768 Log file, useful mostly for debugging
Tune-3238-BurnsWaltzes.abc 444 ABC music file with the extracted tune(s)
Tune-3238-BurnsWaltzes.ps 34367 PostScript
Tune-3238-BurnsWaltzes.txt 444 Plain-text file with the extracted tune(s)
Tune-3238-get.log 4581 Log file, useful mostly for debugging
Tune-32387-get.log 3397 Log file, useful mostly for debugging
These files should be available for 24 hours.