pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9202-AGW06.ps) >>/Users/jc/w/tmp/Tune-9202-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/event/20180820/AGW06.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_92025.log 271839 Log file, useful mostly for debugging
Coll_92027.log 137362 Log file, useful mostly for debugging
Tune-9202-AGW06.abc 444 ABC music file with the extracted tune(s)
Tune-9202-AGW06.ps 34360 PostScript
Tune-9202-AGW06.txt 444 Plain-text file with the extracted tune(s)
Tune-9202-get.log 4382 Log file, useful mostly for debugging
Tune-92024-get.log 3142 Log file, useful mostly for debugging
Tune-92025-Chansonspour_Elisabeth.abc 296 ABC music file with the extracted tune(s)
Tune-92025-Chansonspour_Elisabeth.ps 33079 PostScript
Tune-92025-Chansonspour_Elisabeth.txt 296 Plain-text file with the extracted tune(s)
Tune-92025-get.log 4873 Log file, useful mostly for debugging
These files should be available for 24 hours.