pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28767-Rev2018.ps) >>/Users/jc/w/tmp/Tune-28767-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Finland/Rev2018.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_28767.log 133131 Log file, useful mostly for debugging
Tune-28767-Rev2018.abc 17236 ABC music file with the extracted tune(s)
Tune-28767-Rev2018.ps 191004 PostScript
Tune-28767-Rev2018.txt 17236 Plain-text file with the extracted tune(s)
Tune-28767-get.log 21625 Log file, useful mostly for debugging
These files should be available for 24 hours.