pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16883-AGW02.ps) >>/Users/jc/w/tmp/Tune-16883-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/program/20190107/AGW02.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_16883.log 419338 Log file, useful mostly for debugging
Tune-16883-AGW02.abc 444 ABC music file with the extracted tune(s)
Tune-16883-AGW02.ps 34361 PostScript
Tune-16883-AGW02.txt 444 Plain-text file with the extracted tune(s)
Tune-16883-get.log 4537 Log file, useful mostly for debugging
These files should be available for 24 hours.